Dovecot LMTP rejecting mail from address with apostrophe

[Daniel Lange]

Am 14.06.19 um 16:20 schrieb Michal Krzysztofowicz via dovecot:
> Jun 14 11:57:34 atlantic smtpd[42606]: 21749fd12ac76b57 mda delivery evpid=56aed6237d6444a0 from=<firstname.o'lastname at example.com> to=<me at example.org> rcpt=<me at example.org> user=me delay=0s result=PermFail stat=Error ("mail.lmtp: LMTP server error: 501 5.5.4 Invalid FROM: Invalid character in localpart")

That's essentially the same bug as mentioned in 
<6386018f-22b2-9562-b5a2-36e81cbe2892 at debian.org> (bounces on invalid 
UTF-8 in localpart) that got assigned DOP-1045. Dovecot LDA and LMTP 
should just not care about remote address validity when delivering 
locally. It's not the LDA's business.