How can I set a simple forwarding procmail rule based on FROM?

Question

Using Procmail, I would like to add a rule that dictates:

If any email comes from this specific email address, in addition to delivering it locally, also forward it to this other email address.

My attempt at this rule is as follows:

:0 c: * ^From:[email protected] ! [email protected]

... but this does not appear to work. In fact, it appears to not do anything.

tripleee · Accepted Answer · 2021-10-06 17:12:09Z

You really should provide debugging details with an example of the message you are testing with; but we can speculate:

Maybe the regex doesn't match. Perhaps you actually mean
```
:0c * ^From:(.*\<)?sender@example\.com ! [email protected] 
```
Notice also the absence of a second colon after the c flag (you cannot meaningfully use a lock file here, nor should you) and the addition of a backslash before the .com to only match a literal dot, not any character.
Maybe you are not calling Procmail at all.

Can you demonstrate that Procmail actually gets run when you receive mail? Perhaps see also https://www.iki.fi/era/mail/procmail-debug.html

Thank you very much. I used your exact syntax and formatting and now it is working properly. Yes, mailserver and procmail were already working - I was already doing other procmail rules, etc. - just couldn't get this very simple one worded just right. Thank you again. — user227963
– user227963, Commented Oct 6, 2021 at 16:54
The link also has some useful tips for how to test things. Thanks for the accept! — tripleee
– tripleee, Commented Oct 6, 2021 at 17:15

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