How to know which error occurred
Author: SuheylZCreated Jun 19, 2025Updated Jul 3, 2025
I need to know what exactly cause some issue. for instance there might be different errors.
- 521 Server does not accept mail
- 552 Requested mail action aborted: exceeded storage allocation
- 422 Recipient’s mailbox has no space.
- 450 Recipient domain’s MX records missing or invalid
- 450/550 Recipient server temporarily rejects first-time senders
in each case the retry logic is going to be different. so using PhpMailer, how can I know what caused failure?
Source: PHPMailer/PHPMailer