Hi, did you see this thread?
https://dovecot.org/list/dovecot/2018-October/113348.html <https://dovecot.org/list/dovecot/2018-October/113348.html> Had a similar issue with CHUNKING and Apple Mail, but could reproduce it with a Perl script, too. But I do not whether this was fixed already in v2.3.4 (nothing found in the release notes). Could be that relaying PIPELINING hast the same issues with “multi-line replies”. Regards, Paul > On 18. Dec 2018, at 07:18, Aki Tuomi <aki.tu...@open-xchange.com> wrote: > > >> On 18 December 2018 at 02:30 Adi Pircalabu via dovecot < dovecot@dovecot.org >> <mailto:dovecot@dovecot.org>> wrote: >> >> >> On 2018-12-18 07:33, Ruud Voorjans wrote: >>> Dear all, >>> >>> I'm running dovecot # 2.3.2.1 - Pigeonhole version 0.5.2 () - OS: >>> Linux 4.18.0-12-generic x86_64 Ubuntu 18.10 with Submission. >>> It works great except with apple mail (Iphone). >>> >>> I get an error with the MTA (postfix): >>> ""postfix/submission/smtpd[32552]: warning: non-SMTP command from >>> mail.example.org [1][xx.xx.xx.xx]: Content-Transfer-Encoding: 7bit"" >>> >>> with other mail-client(s) (Outlook (Desktop and Iphone app)) i have no >>> problem and it proxy-sends the e-mail beautiful out to the recipient. >> Hardly anything to do with Dovecot. When it comes to email clients Apple >> Mail has been and is still one of the worst flops (no offence intended, >> just my opinion based on personal experience). If you can reliably >> reproduce it, try and log the raw SMTP conversation between Postfix and >> the client by enabling per IP debugging in Postfix: >> postconf -e "debug_peer_level = 20" >> postconf -e "debug_peer_list = xx.xx.xx.xx" >> postfix reload >> where xx.xx.xx.xx is the unlucky client IP address. >> >> Possibly some crappy SMTP PIPELINING implementation at the Apple end, >> who knows. >> >> -- >> Adi Pircalabu > > It's not unconceivable that there are bugs in submission either. Can you > provide doveconf -n and submission rawlogs? See > https://wiki.dovecot.org/Submission for settings. > > --- > Aki Tuomi Paul Hecker p...@iwascoding.com <mailto:p...@iwascoding.com> http://www.iwascoding.com <http://www.iwascoding.com/> iwascoding GmbH Weserstr 18, 10247 Berlin HRB 97269 B Amtsgericht Berlin-Charlottenburg Geschäftsführer: Paul Hecker, Ilja Iwas
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