Configuring an MTA to work with DKIM

[VanLidl]

This probably one for ravenstar68

Dear Tim

I hope you can help me with my issue.

I am running a home LAMP server for a website and have installed "nullmailer" (instead of Postfix which is far too complex for my simple requirement) as a simple MTA for sending emails via Virgin Media which is acting as the Relay SMTP server.

All is working well while testing including the SPF and DMARC records which have a "pass" in the authentication results according to the headers of the emails I've tested.  The DKIM is showing "unknown" as no keys have been set up. The documentation for nullmailer is a bit sparse and would like to know how it can be configured after setting up the keys e.g. using OpenDKIM ?

I am also having an issue with the odd "Cron Daemon" email message being sent automatically while nullmailer is active.  Have tried MAILTO="" in the crontab settings.  I wondering if I'm missing a trick ?

Looking forward to hearing from you.

ATB

Van

[VanLidl]

Solved it !

Reverted to Postfix as the MTA instead of nullmailer.  Used a couple of online tutorials to configure a basic Postfix set up from scratch and it worked.

Had to find a good DKIM online tutorial and used Opendkim set up with a KeyTable and SigningTable and TrustedHosts.

Managed to create an email where SPF, DKIM, DMARC where all 3 authentication results were pass.  Now I can moved on with confidence to include the functionality in my webserver.

Feel free to PM me for the details.

ATB

Van

[用心棒]

Good to read that you solved the issue.

Do consider documenting the solution here and mark that post as helpful so others experiencing a similar issue can benefit from it.

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