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<p>Hello,</p>
<p>I'm looking for advices on IMAP config tuning for best user
experience with Outlook 365.<br>
I'm currently using dovecot 2.3.4.1 (f79e8e7e4) provided with
Debian 10.<br>
One of my users has Outlook 365 and an IMAP mailbox of large size
with several folders (more than 3GB).<br>
From time to time as his main inbox folder is growing he can see
some problems with its Outlook application.<br>
Sometimes it freezes during mailbox synchronisation, sometimes he
can't see new incoming emails.<br>
</p>
<p>I wonder if there is some specific workarounds for an up-to-date
Outlook in Dovecot or if you can suggests some config setup
adjustments (timeouts, idleing ...) to avoid problems in his
Outlook.<br>
Most of the config are defaults. But I can provide relevant parts
of the config if needed.</p>
<p>I have this workaround activated for a long time<span
class="sig-name descname"><span class="pre"><span
class="highlighted">:<br>
imap_client_workarounds = delay-newmail</span></span></span><br>
</p>
<p>By the way, I also have a big IMAP mailbox. Can't see any server
specific problem while connecting with Thunderbird to this Dovecot
server.<br>
</p>
<pre class="moz-signature" cols="72">--
Best regards,
Artur</pre>
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