Why is my newly created autoresponder sending me emails containing the following message:
Mail failure - no recipient addresses
The message can happen when the email the autoresponder replies with is not able to be delivered. The email sent by the responder gets rejected by the remote email receiver. The 'bounce' email comes back to the server. The server attempted to send the user's 'bounce' email, returning to the autoresponder. The autoresponder then ignores the 'bounce' email.
You can see if the autoresponder rejects the 'bounce' email message by looking in the cPanel account file 'info.log' inside the '.autorespond' directory.
If the info.log file shows the following warnings, the autoresponder ignores a 'bounced' email message.
Example from log:
# cat info_log
[2021-09-01 11:27:18 +0200] info [autorespond] From matches commonly used mailer daemon address, skipping auto reply
[2021-09-02 12:31:25 +0200] info [autorespond] From matches commonly used mailer daemon address, skipping auto reply
[2021-09-03 13:42:17 +0200] info [autorespond] From matches commonly used mailer daemon address, skipping auto reply
You would need to determine the reason for the emails bouncing to stop receiving the message. We have a few support articles that can help start the search.
Article: SMTP error from remote mail server after end of data: 550 Message blocked.
Article: Why can I receive, but not send, emails?