Hi, I have been trying to setup zeptomail, however after lots of investigation I can see the MAIL FROM line in the SMTP logs looks like :-
MAIL FROM:example@example.com BODY=8BITMIME SMTPUTF8
The “BODY=8BITMIME SMTPUTF8” at the end is causing the error
”Failed to send a testing email to “example@example.com“ failed to issue MAIL command: 501 Syntax error in MAIL command”
Is there anyway to turn off the 8BITMIME (or smtp extensions)?