Den 21. aug. 2018 08:44, skrev Robert Schetterer:
> Am 21.08.2018 um 00:25 schrieb Asai:
>> Greetings,
>>
>> We have many iOS clients, andomain.net <http://andomain.net> some report
>> that they’re having problems with iOS mail copying messages to their
>> Sent folder. This happens 2 - 3 times per day, and the phone just says
>> Sending and the client never knows if it sends. Client says apparently
>> email DOES go out, but there is no recording of it. This is usually on
>> our LAN.
>>
>> We’re not sure if this is solved via Postfix or Dovecot, or maybe
>> something else, so I’m posting this message on both forums as a start.
>> Can anyone point us in the right direction here?
>>
>> Running Postfix 2.11.1 and Dovecot ee 2.2.18.2
> this is usual a imap copy to sent folder ( in your case solved with
> dovecot )
> your dovecot version is not up2date, perhaps update
> make sure that imap con do not timeout during transmission etc
>
There is a setting in iOS mail-client which lets you turn of copying of
sent mail to the Sent folder. Check that on the failing clients. There
is nothing in the mail-protocols per se that forces saving of sent mail,
so either the client has to initiate a save via dovecot, or the MTA
(postfix) has to be set up to do a copy of all submitted mail. The
latter is possible, but a little finicky.
