Apple mail fails with Submission

[Paul Hecker]

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.tuomi at open-xchange.com> wrote:
> 
> 
>> On 18 December 2018 at 02:30 Adi Pircalabu via dovecot < dovecot at dovecot.org <mailto:dovecot at 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
paul at iwascoding.com <mailto:paul at iwascoding.com>
http://www.iwascoding.com <http://www.iwascoding.com/>

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