If a transmission has failed, check the following first:
- Accessibility of the mailer URL
- HTTPS certificate
- CORS authorisation for different domains
- PHP and Web Server Protocol
- SMTP or mail server protocol
- Environment variables
- Sender and import address
- Firewall and outbound SMTP connection
- PHP version and required PHP extensions
- post_max_size
- File permissions for PHP, CSS and PHPMailer files.
Typical messages:
- Server configuration incomplete
A required environment variable is missing, or the configured CSS file is unreadable.
- SMTP configuration incomplete
SMTP_HOST, SMTP_USER or SMTP_PASS is missing.
- Invalid email configuration
An email address, the SMTP port, the encryption or the mail transport is invalid.
- Transaction ID not found
The transaction data provided is missing the UUID required for the import.
- Booking details could not be transmitted
The mail server could not be reached or did not accept the import email. Further information can be found in the server log.
- HTTP-Status 405
The Mailer file was not accessed using the intended POST request.
