Woo hoo! I think I found the issue! I'm guessing this is probably an obvious thing, but I went line by line through my main.cf and found:
mime_header_checks = regexp:/etc/postfix/header_checks header_checks = regexp:/etc/postfix/header_checks Not sure when I added those (it's been quite a while), but commenting them out seems to have resolved the issue! I'm not sure if I need to be doing the header checks a different way. Recommendations would be appreciated. Thank you to everyone! Your input and help finally got me looking in the right places for the right things! The users on this mailing list are amazing! -Ken > On May 9, 2025, at 11:07 PM, Nick Tait via Postfix-users > <postfix-users@postfix.org> wrote: > > On 10/05/2025 15:29, Nick Tait via Postfix-users wrote: >> But of course if the first scenario still exhibits the issue, then that >> probably disproves my theory immediately? > > Just thinking a bit more about this... If the first test fails, then you can > compare the headers and body in the received email with what you sent in the > raw email text file, to see if there have been any changes made in-transit. > If there aren't any differences, then the most likely explanation for the > DKIM failure would have to be a DNS issue - i.e. the server validating the > DKIM signature isn't getting the right data when querying for the DKIM > selector? In that case you might look at whether you get different results > when you query the TXT record (e.g. with "dig" tool) using your local > resolver vs. using 8.8.8.8 (for example)? > > Nick. > > _______________________________________________ > Postfix-users mailing list -- postfix-users@postfix.org > To unsubscribe send an email to postfix-users-le...@postfix.org _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
