When you set submission_host, sieve will also use that SMTP server for doing reject/forward/vacation, etc:

https://doc.dovecot.org/configuration_manual/sieve/sieve_and_smtp_submission...

If you don't set submission_host, sieve will instead rely your local sendmail binary. Your local sendmail (or sendmail-compatible interface) is probably broken/misconfigured.

• Eirik

On 2024-06-19 16:14, savaw82275--- via dovecot wrote:

Hi! Having a sieve rule:

require ["fileinto", "editheader", "variables", "envelope"]; ​# rule:[med] if allof (address :contains "to" "info@mysite.com", header :contains "subject" "invoice") { deleteheader "from"; addheader "from" "info@mysite.com"; redirect "final@mysite.com"; }

I was receiving: redirect action: failed to redirect message to final@mysite.com: Sendmail program returned error (temporary failure).

Enabled debug log level in dovecot, then got some few further lines on this; program exec:/usr/sbin/sendmail (55356): Terminated with non-zero exit code 75

AND this:

Error: sieve: redirect action: failed to redirect message to

After 2 hours of Google'ing, I finally found a workaround by adding:

submission_host = 95.212.12.10 (IP address of my mail server) in dovecot.conf solved the issue.

Can someone explain what was the issue and do you guys think this is a correct solution?

Regards.

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