logo of letters W H M C S

WHMCS

  • Installation Guide
  • Release Notes
  • Change Log
  • Developer Documentation
  • Contact Support
  • Choose Version
  • Login
    • Get Started with WHMCS
    • System Requirements
      • Install WHMCS
      • Install on the Command Line
      • Install with cPanel Site Software
      • Install with Plesk WHMCS Installer
      • Install ionCube Loader
      • Migrate Data to WHMCS
      • Set Up a Test Environment
      • Uninstall WHMCS
      • Enhancing Security
      • Secure Writeable Directories
      • The configuration.php File
      • Secure the Configuration File
      • Move the Cron Directory
      • Rename the Admin Directory
      • Getting Started Wizard
      • Setup Tasks
      • Restrict NGINX Directory Access
    • Addon Modules
    • Bulk Pricing Updater
    • Configurable Package Addon
    • cPanel Licensing
    • Google Analytics
    • ImportAssist
    • KashFlow Accounting
    • Live Chat
    • MailChimp
    • Project Management
    • Reseller License Manager
    • Software Licensing
    • SolusIO
    • Admins
    • The Admin Area
    • The Admin Dashboard
    • Apps & Integrations
    • Admin Tools
    • Notifications
    • My Account
      • Accept an Admin Invitation
      • Add an Admin
      • Add or Edit an Administrator Role
      • Change the Number of Results
      • Configure an Admin Avatar
      • Configure Email Notifications
      • Configure HipChat Notifications
      • Configure Slack Notifications
      • Create Admin Dashboard Widgets
      • Disable Admin Notifications
      • Disable an Admin
      • Edit an Admin
      • Log In to the Admin Area
      • Manage Dashboard Widgets
      • Resend an Admin Invite
      • Reset an Admin Password
    • Billing Logic
    • Billable Items and Time Billing
    • Overage Billing
    • Prorata Billing
    • Invoice Management
    • Invoice Configuration
    • Custom PDF Invoices
    • On-Demand Renewals
    • Quotes
      • Add a Billable Item
      • Add Time Billing
      • Change Invoice Instructions
      • Change Your Payment Address
      • Configure Payment Reminders
      • Convert Invoice Currencies
      • Create a Mass Payment Invoice
      • Create a Prorata Invoice
      • Create a Renewal Invoice Early
      • Create Separate Renewal Invoices
      • Customize Your Invoice Numbering
      • Enable Proforma Invoicing
      • Merge Invoices
      • Regenerate Invoices
      • Skip an Invoice
      • Snapshot Customer Invoice Data
    • Users and Client Accounts
    • Emailing Clients
    • Managing Users
    • Client Groups
    • Security Questions
    • Client Email Verification
    • Banned Emails
      • Affiliate System
      • Managing Affiliates
      • Affiliate Links
      • Announcements
      • Custom Fields
      • Linking to WHMCS
      • Maintenance Mode
      • Network Issues
      • Summary Tab
      • Profile Tab
      • Users Tab
      • Contacts Tab
      • Products/Services Tab
      • Domains Tab
      • Billable Items Tab
      • Invoices Tab
      • Quotes Tab
      • Transactions Tab
      • Tickets Tab
      • Emails Tab
      • Notes Tab
      • Log Tab
      • Add a Client
      • Add and Associate Users
      • Match User and Client Details
      • Reset a User Password
      • Set a User Password Manually
      • Activate an Affiliate
      • Customize Affiliate Links
      • Delete Inactive Clients
      • Export Client Data
      • Require Opting-In to Emails
      • Require Terms and Conditions
      • Resend a Welcome Email
    • Countries and Calling Codes
    • Custom Modules
    • Custom Order Form Templates
    • Custom Reports
    • Error Pages
    • Integration Code
    • Models
    • Replace Legacy Smarty Tags
    • Sessions
    • Themes and Templates
    • Transliteration
    • WHMCS Base URL Template Variable
    • Single Sign-On into WHMCS
      • Client Area Homepage Panels
      • Client Area Layout
      • Client Area Navigation Menus
      • Client Area Sidebars
      • Customizing Promotions
      • Menu and Sidebar Context
      • Preview a Template
      • Create a New Order Form Template
      • Create Customizations with Git
      • Customize Quick Shortcuts
      • Disable Feature Highlights
      • Manually Update Customizations
      • Update Customizations with Git
        • Add a Panel to Specific Pages
        • Add a Promotional Offer Panel
        • Add a Social Media Panel
        • Add a Special Offer Panel
        • Add an Informational Panel
        • Create a Two-Column Panel
        • Modify an Existing Panel
        • Rearrange Panels
        • Remove a Panel
        • Add a Menu Item
        • Change a Menu Item Label
        • Change a Menu Item Link
        • Open Menu Links in New Tabs
        • Rearrange Menu Items
        • Remove a Menu Item
        • Add a Sidebar Item
        • Change a Sidebar Menu Label
        • Change a Sidebar Menu Link
        • Rearrange Sidebar Items
        • Remove a Sidebar Item
    • Selling and Managing Domains
    • Domain Registrars
    • Lookup Providers
    • Domain Statuses
    • Client Area Domain Registration
    • ICANN Policies
    • WHOIS Servers
    • SSL Monitoring
      • 101Domain
      • Affordable Domains
      • CentralNic Reseller
      • Email Notifications
      • Enom
      • GoDaddy
      • HEXONET
      • Internet.bs
      • IPMirror
      • Namecheap
      • NetEarthOne
      • Nominet
      • OnlineNIC
      • OpenSRS
      • Register.com
      • Register.eu
      • ResellerCamp
      • ResellerClub
      • Stargate/UK2
      • TPP Wholesale
      • TransIP
      • WebNIC
      • Add Spotlight TLD Logos
      • Automatically Renew on Payment
      • Configure a Domain Extension
      • Configure a Lookup Provider
      • Configure Grace Periods and Fees
      • Customize Registration Options
      • Disable Automatic Renewals
      • Enable Client Area Renewals
      • Manually Register a Domain
      • Manually Renew a Domain
      • Reattempt Registration or Transfer
      • Retry a Registrar Module Action
      • Set Default Nameservers
      • Set Domain Length Restrictions
      • Set Domain Renewal Restrictions
      • Set Up a Domain Registrar
      • Set Up the Enom Registrar
      • Transfer a Domain
      • Transfer a Domain Between Clients
      • Domain Pricing
      • Free Domains
      • International Domain Names
      • Premium Domains
      • Registrar Pricing Sync
      • Domain Categories
      • Custom Domain Fields
      • Domain Renewals
      • Domain Renewal Notices
      • Grace and Redemption Periods
      • Domain Transfers
      • Domain Resolver
    • MarketConnect
    • MarketConnect Landing Pages
    • MarketConnect Promotions
      • Activate MarketConnect
      • Configure MarketConnect Pricing
      • Deposit Funds
      • Set Up Balance Alerts
      • Set Up Balance Reloading
      • Start Selling MarketConnect
      • 360 Monitoring
      • CodeGuard
      • marketgoo
      • NordVPN
      • OX App Suite
      • SiteLock
      • SiteLock VPN
      • SpamExperts
      • SSL Certificates
      • SocialBee
      • Web.com Site Builder
      • Weebly
      • XOVI NOW
    • Order Management
    • Order Statuses
    • Spam Orders
    • Fraud Protection
    • FraudLabs Pro
    • MaxMind
    • User Identity Verification
      • Create an Order
      • Activate an Order
      • Modify an Order
    • Pay Methods
    • Payment Gateways
    • Accepting PayPal
    • Disputes
    • Payment Reversals
    • Tokenization
    • Custom Gateway Modules
    • Transactions
    • Currencies
    • Tax Configuration
    • Credit Balances
      • 2CheckOut
      • Accept.js by Authorize.net
      • AsiaPay
      • Authorize.net
      • Authorize.net CIM
      • Authorize.net Echeck
      • Bank Transfer
      • BidPay
      • BitPay
      • BluePay
      • BluePay e-Check
      • BluePay Remote
      • Boleto
      • CashU
      • CCAvenue API v2
      • CCAvenue Legacy
      • Direct Debit
      • E-Gold
      • E-Path
      • eProcessingNetwork
      • eWAY
      • F2B
      • Forte
      • Gate2Shop
      • GoCardless
      • iDeal via Mollie
      • inpay
      • IP.Pay
      • Mail In Payment
      • Merchant Partners
      • Merchant Warrior
      • Moneris
      • Moneris Vault
      • Navigate
      • NETbilling
      • Netregistry Pay
      • NoChex
      • Offline Credit Card
      • Optimal Payments
      • Pay Junction
      • PayFlow Pro
      • Payment Express
      • PayPal Basic
      • PayPal Card Payments
      • PayPal Checkout
      • PayPal Payments
      • PayPal Pro Reference Payments
      • PayPal Website Payments Pro
      • PayPoint.net
      • Planet Authorize
      • PSIGate
      • Quantum Gateway
      • Quantum Vault
      • SagePay
      • SagePay Form
      • SagePay Repeats
      • SagePay Tokens v2
      • SecurePay
      • SecurePay AU
      • SecureTrading
      • Skrill
      • Skrill 1-Tap
      • Stripe
      • Stripe ACH
      • Stripe SEPA
      • TrustCommerce
      • Turkish Garanti Bank
      • USA ePay
      • WorldPay
      • WorldPay FuturePay
      • Automatically Update Prices
      • Change a Client's Currency
      • Change the Default Currency
      • Find a Base Conversion Rate
      • Sell in Multiple Currencies
      • Add Restricted API Keys to Stripe
      • Allow Users to Delete Cards
      • Configure a Payment Gateway
      • Configure Payment Capture
      • Configure PayPal Payments
      • Copy a Gateway Module
      • Migrate Payment Gateways
      • Migrate to PayPal Checkout
      • Update the PayPal Webhook URL
      • Change Invoice Tax Rates
      • Configure GST and Collect GSTINs for India
      • Configure VAT and Collect VAT IDs for Europe
      • Configure VAT and Collect VAT IDs for the UK
      • Update Tax Rates
    • Products
    • Product Groups
    • Order Form Templates
    • Link Tracking
    • Upgrades and Downgrades
    • Cancellations
    • Promotions
      • Product Configuration Options
      • Configurable Options
      • Cross-selling Recommendations
      • Product Addons
      • Sitejet Builder
      • Product Bundles
      • Product Downloads
      • Usage Billing
      • WordPress Hosting
      • WP Squared Hosting
      • WP Toolkit
      • Add Sitejet Builder to cPanel Products
      • Add Sitejet Builder to Plesk Products
      • Assign Custom Emails to Products
      • Automatically Provision Services
      • Bill Resellers Per Account
      • Change the Default Order Form Template
      • Change the Default Product Group
      • Configure On-Demand Renewals
      • Configure Product Group Features
      • Configure Recommendations
      • Configure Usage Billing
      • Create a Product
      • Create a Product Group
      • Create a Sitejet Builder Addon
      • Create an Addon
      • Enable Cross-selling
      • Enable Taxes for a Product
      • Hide or Retire Products
      • Link to a Product
      • Offer Free Trials
      • Cancel Services Immediately
      • Delete a Service
      • Move a Service to Another Client
      • Schedule a Service Termination
      • Update the Recurring Amount
      • Upgrade or Downgrade a Service
    • Servers
    • Server Groups
    • Sync Accounts
    • WHMCS Connect
      • Create a Server
      • Create a cPanel Server
      • Create a DirectAdmin Server
      • Create a Plesk Server
      • Create a WP Squared Server
      • Customize Monitoring Ports
      • Migrate cPanel Services
      • Delete a Server
      • Ahsay Backups
      • Auto Release
      • Centova Cast
      • Cloudmin
      • cPanel
      • DirectAdmin
      • Enom SSL
      • FreeRADIUS
      • GlobalSign SSL
      • Helm
      • Helm 4
      • HyperVM
      • InterWorx
      • Plesk
      • Reseller Central
      • ResellerClub SSL
      • SCPanel
      • SolusVM
      • TCAdmin
      • Virtualizor
      • Virtualmin Pro
      • VPS.net
      • WebsitePanel
      • WHMSonic
      • WP Squared
    • Support Tools
    • Support Departments
    • Email Importing
    • Email Piping
    • Support Tickets
    • Ticket Actions
    • Ticket Statuses
    • Predefined Replies
    • Spam Control
    • Knowledgebase
    • Downloads
      • Add a Knowledgebase Article
      • Add a Knowledgebase Category
      • Enable Knowledgebase Suggestions
      • Add a Predefined Reply
      • Add a Support Department
      • Disable Client Ticket Closure
      • Prune Ticket Attachments
      • Remove Quoted Email Replies
      • Schedule a Ticket Action
      • Set Up Email Importing
      • Set Up Email Importing - Google
      • Set Up Email Importing - Microsoft
      • Set Up Email Piping - cPanel
      • Use a Predefined Reply
      • View and Import Blocked Replies
    • Analytics Tracking
    • Banned IP Addresses
    • Captcha Protection
    • Data Feeds
    • Friendly URLs
    • License Information
    • Reports
    • System Cleanup
    • Trusted Proxies
      • Two-Factor Authentication
      • Duo® Security
      • API Credentials
      • Single Sign-On
      • Application Links
      • Sign-In Integrations
      • OpenID Connect
      • OpenID Connect Development
        • Enable 2FA Globally
        • Enable 2FA for Admins
        • Enable 2FA for Clients
        • Log In Without a Backup Code
        • Log In Without a Token
        • Require 2FA
        • Sign In Using Facebook
        • Sign In Using Google
        • Sign In Using Twitter
      • Automation Settings
      • Automation Status
      • System Cron
      • Domain Sync Task
        • Check the Cron Job Status
        • Configure the System Cron Job
        • Configure When Daily Tasks Run
        • Find the Cron php.ini File
        • Resolve a Cron PHP Mismatch
      • Database Backups
      • Database Status
      • Storage Settings
        • Disable MySQL Strict Mode
        • Enable Encrypted MySQL
        • Migrate Local Storage
        • Migrate Storage Locations
        • Restore the WHMCS Database
        • Set Up Amazon S3 Storage
        • Set Up an Amazon S3 Bucket
      • Email Campaigns
      • Email Marketer
      • Email Templates
      • Mail Providers
        • Change the From Address
        • Configure Email Styling
        • Customize Email Templates
        • Disable Outgoing Mail
        • Get Copies of System Emails
        • Localize Email Templates
        • Restore Default Email Templates
        • Set a Global Email Signature
        • Use Google for System Mail
        • Use Microsoft for System Mail
        • Use Other Providers for System Mail
        • Use SMTP for System Mail
      • Affiliates
      • Credit
      • Domains
      • General
      • Invoices
      • Localisation
      • Mail
      • Ordering
      • Other
      • Security
      • Social
      • Support
        • Change How Dates Display
        • Customize Text
        • Enable the Language Menu
        • Set the Default Locale
        • Translate Custom Status Names
        • Translate Product Text
      • Localization
      • Custom Template PHP
      • Legacy Smarty Tags
      • Login Session Length
      • PHP Info
      • PHP Upgrades
      • PHP Version Compatibility
      • Smarty Security Policy
        • Check for Updates
        • Prepare to Update WHMCS
        • Set a Maintenance Message
        • Set the Temporary Update Path
        • Set the Update Channel
        • Update in the Browser
        • Update on the Command Line
        • Update with the Automatic Updater
      • Updating WHMCS
      • Legacy Module Removal
      • Enable Default Captchas
      • Enable hCaptcha®
      • Enable reCAPTCHA v3
      • Change the System Charset
      • Change the System Theme
      • Customize Your Logo
      • Disable Analytics Tracking
      • Enable Friendly URLs
      • Force a License Update
      • Move WHMCS to a New Server
      • Move WHMCS to a New Subdomain
      • Optimize Performance
      • Update PHP with cPanel MultiPHP
      • Update the System URL
    • Start Troubleshooting
    • Enable Error Reporting
    • Errors in WHMCS
    • Logs in WHMCS
    • Module Queue
    • Refresh a Directory
    • System Health
      • General Troubleshooting
      • 404 Page Not Found Errors
      • Admin Directory Errors
      • Blank Admin Dashboard
      • Blank or Partially-Rendered Pages
      • Character Display in Reports
      • Corrupt File Errors
      • cURL Couldn't Connect to Host Errors
      • cURL Couldn't Resolve Host Errors
      • cURL Timeout Errors
      • Dataset Must Be Array Errors
      • Down for Maintenance Errors
      • Duplicate System Theme Options
      • Empty Pages
      • Failed Opening Errors
      • File Cannot Be Decoded Errors
      • File Not Found Errors
      • Impossible root Errors
      • ionCube Fatal Decoding Errors
      • ionCube Loader Site Errors
      • LogicException Template Errors
      • Missing Country Customizations
      • Module Command Unknown Errors
      • Oops! Errors
      • Query String URI Errors
      • Redirect Loops
      • Server Communication Errors
      • Server IP Address in Logs
      • Troubleshooting Addon Modules
      • Addon Module Oops! Errors
      • Missing Addon Modules
        • cPanel License Assigned Errors
        • cPanel License Configurable Option Errors
        • cPanel License Deactivated Errors
        • cPanel License Missing IP Address
        • cPanel License Reactivation Errors
        • cPanel Licensing Options Errors
        • ImportAssist Unable to Connect
        • Live Chat Connection Errors
        • Live Chat Display Issues
        • Live Chat Login and License Errors
        • Live Chat Server or Host Errors
        • Live Chat SMTP Errors
        • Licensing Invalid Key Errors
        • Licensing Local Key Generation
        • Licensing Remote Check Errors
      • Troubleshooting Authentication
      • CloudFlare Proxy Check Errors
      • Duo Security Login Failures
      • Expired Admin Invite Links
      • Facebook App Not Setup Errors
      • Facebook URL Errors
      • Frequent Logouts
      • Google Remote Linking Failures
      • Google Sign In Unavailable Errors
      • Google Verification Failures
      • Invalid Details Errors
      • Invalid Reset Link Errors
      • Login Details Errors
      • Login Redirect Loops
      • Oops! Access Denied Errors
      • Sessions Are Not Removed
      • Social Login Errors
      • Twitter Connection Errors
      • Twitter Link Initiated Messages
      • Unable to Access Sign-In Integrations
      • Troubleshooting the System Cron
      • Cron Failures
      • Cron Frequency Warnings
      • Cron Input File Errors
      • Cron Metrics Polling Timeout
      • Cron System Queue Timeout
      • Cron Time of Day Issues
      • Fatal Memory Size Errors
      • Intermittent Cron Failures
      • No Input File Specified Errors
      • System Timezone Issues
      • Unable to Communicate Errors
      • Undefined curl_init() Function Errors
      • Whoops Exception Errors
      • Troubleshooting Customizations
      • Troubleshooting Hooks
      • Troubleshooting System Themes
      • Troubleshooting WHMCS API Calls
      • Troubleshooting Domains
      • Blank Choose a Domain Page
      • Blank Domain Search Results
      • Domain Availability Errors
      • Domain Management Oops! Errors
      • Domain Pricing Will Not Save
      • Free Domain Is Not Free
      • Missing Contact Details Errors
      • Missing Registrant Contact Errors
      • No Nameservers Are Defined Errors
      • OpenSSL Registrar Errors
      • Registration Suppressed Errors
      • Suppressed Renewal Errors
      • Sync Not Supported Errors
      • TransIP Update Delays
      • TypeError AdditionalFields Errors
      • Unable to Display Pricing Errors
        • Entity Reference Errors
        • Bad User name or Password Errors
        • Enom API cURL Errors
        • Enom Domain Not Found Errors
        • Enom Empty Response Errors
        • Enom Invalid Data Errors
        • Enom User Not Permitted Errors
        • GoDaddy Request Body Errors
        • HEXONET Disconnections and Failures
        • HEXONET Empty Response Errors
        • Namecheap Nameserver Errors
        • Namecheap Registrar Errors
        • Nominet Command Syntax Errors
        • Nominet Connection Errors
        • Nominet Socket Transport Errors
        • OnlineNIC Connection Errors
        • OpenSRS Connection Errors
        • OpenSRS Domain Renewed Errors
        • OpenSRS Order Errors
        • ResellerClub Access Errors
        • ResellerClub Connection Errors
        • ResellerClub Language Code Errors
        • ResellerClub Locked Errors
        • ResellerClub Login Errors
        • ResellerClub Missing Name Errors
        • ResellerClub Pending Actions
        • ResellerClub Telephone Errors
        • ResellerClub Unexpected Errors
        • ResellerClub Unknown Fault Errors
        • ResellerClub Website Errors
        • WebNIC IP Address Errors
        • WebNIC Login Errors
        • WebNIC Partner Failures
      • Troubleshooting System Email
      • Broken Renewal Links in Emails
      • Data Not Accepted Errors
      • Email Flagged as Spam
      • Email Marketer TypeErrors
      • Email Template Syntax Errors
      • Failed Recipients
      • Message Body Empty Errors
      • No Recipients Errors
      • SendEmail Sending Failure
      • Sending Aborted by Hook
      • Sending Aborted Configuration
      • Sending Aborted Errors
      • Smarty Policy Errors
      • Undisclosed Recipients
      • Unsent General Emails
      • Unsent Ticket Notifications
      • Unsent Welcome Emails
        • Microsoft Connection Failures
        • Microsoft Mail Query Errors
        • Could Not Instantiate Errors
        • Undefined PHPMailer Function Errors
        • Sender Verify Failed Errors
        • SMTP Authentication Errors
        • SMTP Connection Errors
        • SMTP Password Command Failed Errors
      • Troubleshooting Installation
      • Duplicate tblconfiguration Errors
      • License Key Required Errors
      • Stuck Installation Process
      • Troubleshooting Invoices
      • Blank Invoices
      • Cancelled Domain Renewal Invoices
      • Duplicate Invoices (Different Dates)
      • Duplicate Invoices (Same Dates)
      • Duplicate tblinvoices Errors
      • Invoices Are Missing Tax
      • Logout During Invoice Download
      • Missing Domain Renewal Invoices
      • Missing Payment Reminders
      • Missing Service Invoices
      • Question Marks in PDF Invoices
      • TCPDF Image Size Errors
      • TCPDF Timeouts
      • Unexpected Invoice Details
      • Unexpected Next Due Date
      • Troubleshooting Licensing
      • Invalid License API Errors
      • Invalid License Errors
      • Invalid Licenses on HostGator
      • No Connection Errors
      • Troubleshooting MarketConnect
      • MarketConnect 404 Errors
      • Promotion Display Issues
        • Instant Issuance Deployment Errors
        • Instant Issuance Not Acquired Errors
        • Instant Issuance Unspecified Errors
        • Instant Issuance Validation Errors
        • Key Generation Failed Errors
        • SSL Provisioning Issues
      • Troubleshooting Orders
      • MaxMind License Key Errors
      • MaxMind License Required Errors
      • MaxMind Request Errors
      • MaxMind User ID Errors
      • Troubleshooting Payments
      • Blank Payment Gateway Page
      • Configuration Function Errors
      • Duplicate Transactions
      • Exchange Rate Update Failures
      • Invalid Access Attempt Errors
      • Invalid VAT Number Errors
      • MD5 Hash Failures
      • No Gateway Log Entries
      • Oops! Module Not Found Errors
      • Quantum Vault Missing Ending Errors
      • Remote Transaction Failure Errors
      • Unexplained Declines and Failures
      • Unrecorded Transactions
      • Unsupported Protocol Errors
      • User Redirected to Wrong Page
        • 2CheckOut Inline Checkout Crash
        • Authentication Failed Errors
        • PE101 Errors
        • Parameter currCode Incorrect
        • Field is Required Errors
        • Missing Card Fields
        • GoCardless Inactive Token Errors
        • GoCardless Remote Storage Errors
        • iDeal via Mollie Transaction Errors
        • Duplicate Invoice ID Errors
        • Missing PayPal Payments
        • Missing PayPal Subscriptions
        • Orphaned PayPal Subscriptions
        • PayFlow Pro Local Card Errors
        • PayFlow Pro Remote Storage Errors
        • PayPal IPN Failures
        • PayPal Log Entries
        • PayPal Old Transaction Errors
        • PayPal Security Errors
        • PayPal SSL Errors
        • PayPal Transaction ID Errors
        • PayPal® Invalid Receiver Errors
        • PayPal® Not Supported Errors
        • PayPal® Not Working Errors
        • PayPal® Unrecognized Currency Errors
        • Unexpected PayPal Cancellation Emails
        • No Stripe Customer Details Errors
        • Stripe ACH General Errors
        • Stripe ACH Invalid Token Errors
        • Stripe and RBI Regulations
        • Stripe Bad Request Errors
        • Stripe CVC Value Errors
        • Stripe Network Errors
        • Stripe Payment Method Errors
        • Stripe PCI Compliance Issues
        • Stripe Remote Transaction Failures
        • Stripe Statement Descriptor Errors
        • Stripe Try Again Errors
        • WorldPay Invisible NMTOKEN Errors
      • Troubleshooting PHP
      • 500 Internal Server Errors
      • Allowed Memory Exhausted Errors
      • ExceptionLoggingTrait Errors
      • InvalidArgumentException Carbon Errors
      • Legacy Smarty Tag Errors
      • OPcache Warnings
      • PHP Execution Time Errors
      • Required Function Errors
      • Segmentation Fault Errors
      • TypeError covertIniSize Errors
      • TypeError guessFileExtension Errors
      • Troubleshooting Products and Services
      • Member Function Renewal Errors
      • On-Demand Renewal Unsupported
      • Recommendation Display Issues
      • Service Not Prorated
      • shortDescription Errors
      • Unexpected Service Suspensions
      • Unexpected Service Terminations
      • Troubleshooting Server Issues
      • 406 Not Acceptable Errors
      • Account Creation Failures
      • Product Module Missing Errors
      • Server Deletion Errors
      • Status Monitoring Display Issues
        • Access Denied Errors
        • Action Failed Errors
        • Group Already Exists Errors
        • Invalid cpmod Errors
        • Invalid Numeric Value Errors
        • License Profile Errors
        • Login Failed Errors
        • Missing Username Errors
        • Missing WHM Packages
        • Missing WHM Username Errors
        • Package Not Allowed Errors
        • Package Permission Errors
        • Product Attribute Errors
        • Reseller Subdomain Errors
        • Username Reserved Errors
        • wptoolkitcli Errors
        • _getSSORedirectUrl Errors
        • Blank Command Errors
        • Client Pool Errors
        • Domain Setup Failures
        • Email Not Found Errors
        • Invalid Request Errors
        • Limitations Exceeded Errors
        • Parser Errors
        • Permission Denied Errors
        • Plesk Connection Errors
        • Plesk Login Errors
        • Template Errors
        • Username Required Errors
        • Version Errors
        • www Does Not Work
      • Troubleshooting SSL
      • Certificate Not Detected Errors
      • Certificate Subject Mismatch Errors
      • Insecure Connection SSL Errors
      • Invalid or Corrupt Certificate Errors
      • Outdated root CA Bundles
      • Troubleshooting the Client Area
      • Captcha Verification Failed
      • Client Area Title Display Issues
      • Invalid Site Key Errors
      • Order Now Refreshes the Page
      • Prices Incorrect in Cart
      • Troubleshooting the Database
      • (S)FTP Backup Upload Errors
      • (S)FTP Unable to Open Errors
      • (S)FTP Unable to Write Errors
      • Argument PDOStatement Errors
      • Base Table or View Not Found Errors
      • Column group_id Null Errors
      • Command Denied Errors
      • Could Not Connect Errors
      • Duplicate Entry Errors
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  1. WHMCS
  2. Troubleshooting
  3. Troubleshoot the Support System
  4. Ticket Replies

Unregistered Address Errors

Troubleshoot and resolve The sender's email address is not registered errors.

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