Amavis Signing Incoming Mail

Stephen Guglielmo srguglielmo at
Sat May 12 03:16:04 CEST 2012


I have Amavis-new setup with Postfix, ClamAV, and spamassassin. I have
it verifying and signing emails using dkim.

I noticed that when I send myself an email from an off-server account,
amavis adds a dkim signature to that email, then maildrop delivers it.
An example:

This is in the headers of an email sent to my server running
amavis-new, from a third party email provider.

Authentication-Results: domain.tld (amavisd-new);
     dkim=pass (1024-bit key) reason="pass (just generated, assumed good)"
     header.d=domain.tld DKIM-Signature: v=1; a=rsa-sha256;
c=relaxed/simple; d=domain.tld; h=
     :received:received:received:received; s=mail; t=1336784874; x=
     1336871275; bh=24DdfY1P3gOE62wbCjpxXNsBrPKUqpfZxa5YiPHQpGM=; b=i

As you can see, it says "just generated, assumed good." I want to sign
all outgoing mail, but what is the point of signing incoming mail as
well? Is there a way to prevent this?

Thank you

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