Douglas, Daniel via Exim-users <[email protected]> (Mi 07 Nov 2018 21:46:38 CST): > We need to add disclaimers to out email and also use DKIM to sign our > messages. Each of these things work individually but if they are both > configured on a transport then the DKIM check fails because the disclaimer is > added after the signature has been added. The disclaimers are added using > altermime in a transport filter (see transport below)
You should refuse to use your MTA for message alteration.
Adding a disclaimer may do a lot of harm. E.g. it will destroy a GPG
signature, or it will be outside of the GPG signature, and worthless
then.
What you *can* do is, checking if the disclaimer exists (in unencrypted
messages) and your MTA can refuse to transport such messages.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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