DKIM is driving me nuts

John R. Levine johnl at
Wed Sep 5 22:46:41 UTC 2018

> type "Mail wfdudley at" on the command line of my server
> and send a simple one line email with DKIM signing turned on.
> Google (and others) say the message fails DKIM "bad signature".
> Send the identical message from Thunderbird, and the message passes DKIM
> checks at the other end.
> Something is different between using Mail/mailx and using Thunderbird,
> and I've given up trying to figure out what.

Please reread my message.  It told you why it's doing that.

John Levine, johnl at, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail.

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