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Questions - dkim

How can Postfix filter email (DKIM) without keeping the message in memory and without writing it to disc twice?

I need to DKIM sign possibly huge emails (up to 150MB). I’m running Postfix and so far want to keep that MTA. Conceptually DKIM needs to go over the email twice: once to calculate and sign the checksu...
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Robert Siemer

postfix-mta

dkim

milter

opendkim

Votes: 0

Answers: 1

Latest Answer

Postfix queue files are not flat mails. Adding a header does not require a rewrite. To take advantage of that use the milter interface. The answers I got from postfix-users make me believe mail is not...
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Robert Siemer

How to understand DKIM signing domains?

So i have a mail server say "mailer.com". Postfix handles mail for mailer.com also for "virtual.com" (postfix virtual domain). So, when i create the DKIM key pair: opendkim-genkey ...
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zoneblue

postfix-mta

dkim

Votes: 0

Answers: 1

Latest Answer

You need to create keys for each domain you want to sign messages for and put appropriate DNS records in each domain DNS zone.
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AlexD

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