Autoresponder problem: Mail failure - no recipient addresses

[stormy]

I've discovered a new problem with the email autoresponders. Sometimes the account receives a bounce with "Mail failure - no recipient addresses". I think it happens when the email that reaches the inbox is a CC or BCC. The bounce clearly states that cPanel tried to send an email with an empty "To:" line.

 

[cPanelLauren]

Can you provide log output of this? The exim logs are at /var/log/exim_mainlog

 

[stormy]

I've redacted usernames, etc. Not sure how informative this is. This is all internal addresses, the recipient is being CC'd.

2020-08-06 16:18:11 H=(DESKTOPII62EE8) [94.248.124.XXX]:55801 Warning: "|/usr/local/cpanel/bin/autorespond [email protected] /home/USER/.autorespond"
2020-08-06 16:18:11 1k3gih-0006p1-Aq <= [email protected] H=(DESKTOPII62EE8) [94.248.124.XXX]:55801 P=esmtpsa X=TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no A=dovecot_login:[email protected] S=93371 id=000501d66bfc$69d[email protected] T="RV: ___SUBJECT____" for [email protected] [email protected]
2020-08-06 16:18:11 1k3gih-0006p1-Aq => RECIPIENT <[email protected]> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <[email protected]> YLTXMSMRLF8DNgAAY6BCVw Saved"
2020-08-06 16:18:12 cwd=/ 4 args: /usr/sbin/sendmail -odb [email protected] -t
2020-08-06 16:18:12 1k3gii-0006ql-BR <= <> R=1k3gii-0006qe-BB U=mailnull P=local S=1545 T="Mail failure - no recipient addresses" for [email protected]
2020-08-06 16:18:12 1k3gih-0006p1-Aq ** |/usr/local/cpanel/bin/autorespond [email protected] /home/USER/.autorespond ([email protected]) <[email protected]> R=virtual_aliases_nostar T=cagefs_virtual_address_pipe: return message generated
2020-08-06 16:18:12 1k3gii-0006ql-BR => RECIPIENT <[email protected]> R=virtual_user T=dovecot_virtual_delivery C="250 2.0.0 <[email protected]> WNINGCQRLF8DNgAAY6BCVw Saved"
2020-08-06 16:18:12 1k3gii-0006ql-BR => |/usr/local/cpanel/bin/autorespond [email protected] /home/USER/.autorespond ([email protected]) <[email protected]> R=virtual_aliases_nostar T=cagefs_virtual_address_pipe

 

[cPanelLauren]

Does this same behavior persist when you have the account out of CageFS or only while it is in the cage?

 

[stormy]

The account is using cagefs indeed, I suppose I could get it out of the cage and see what happens. Is this a known problem?

 

[cPanelLauren]

There are occasions when cagefs isn't updated but this isn't a common issue, I'm just trying to rule it out.