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On Wed, 12 Dec 2007, Johannes Berg wrote:

Hmm, mine doesn't check the "From:" header line but rather the envelope
sender which we don't set (so the local user should be used)

Real sendmail is not interessted in the mail data, but envelope data only.

I had a problem with sendmail running from Dovecot's Sieve implemenation, the basic points were:

First the path to sendmail was screwed up, the binary wasn't found at all.
Later I added strace and some other programs to deliver in order to see what's going on, which in turn prevents sendmail to setguid- (or setuid-) to smmsp (or whatever uid/gid the sendmail MSP client is running under) and, hence, it had no access to the client queue.

Some distributions limit sendmail to certain user groups.

BTW: Did you wrapped to call to sendmail with a script in order to capture "id" information and the stderr of sendmail and, probably, its exitcode or kill-signal?

Bye,

- -- Steffen Kaiser
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