DKIM Split

HI all... Been around a looong time, but here is my first post.... I got a lot of email problems at the moment, but I'll just need to work thru them one at a time... SO my first hurdle is.. I'm trying to get DKIM working properly. My Domain Name registrar only allows 256 bit txt records, which MUST be enclosed in quotes. When I use the SPLIT function in cPanel, the first part of the record ends up at 258 characters. Why.. because there are two spaces.. v=DKIM1; k=rsa; p=MIIBI one between the ; and k and one between ; and p. Assuming it's safe to remove the spaces, and after a lot of "trial and error", I find I can get a "Green Light" in the MXtoolbox DKIM test IF I insert "v=DKIM1; k=rsa; p= at the start of the SECOND part of the split. Mind you, I can NOT get a good result from DKIM testers on dmarcanalyser.com or mail-tester.com in any case. Please point in the correct direction!

cPanelLauren

October 29, 2019 22:58

So, registrars and DNS hosting providers alike should be starting to support more complex DKIM signatures but for the ones that don't splitting them is the only recourse. We have had some other threads where the users were able to successfully split the record:

QAZwsxED

October 05, 2020 01:26

I recently solved a similar issue. Solution: manually add a Message-Id (note not a Message-ID) header then connect and send an email. cPanel WHM adds a Message-ID header and re-arranges the 'h' record in the DKIM signature which invalidates it, causing a DKIM:fail in the recipients mailbox.

DKIM Split

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