I'm trying to plug up all the holes where local mail leaves our mail
system without a DKIM signature. One avenue is bounce messages.
I wrote a small sendmail wrapper to add DKIM signatures, and defined
it as the value for dovecot's sendmail_path. I presume Dovecot invokes
this executable when it has to send a send message.
Under what circumstances does this happen? I tried to provoke a mailout
by sending messages to recipients with full quotas and permission locked
mailbox files, but could not generate any mail back.
Joseph Tam <[email protected]>
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