Re: [exim] Exim 4.90 tls session cache

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Author: Marcin Gryszkalis
Date:  
To: exim-users
Subject: Re: [exim] Exim 4.90 tls session cache
On 2018-04-09 00:50, Jeremy Harris via Exim-users wrote:
> Bug 2255.


bingo, it seems that exim's bugzilla is not crawled by google

>> I wonder if anybody observed similar behavior and managed to find
>> better
>> fix (on client side probably?).
>
> Apparently not. We thought that disabling the sessions cache on the
> IMAP service might help (the supposition is that OE is trying to
> re-use the IMAP TLS connection for the SMTP connection, as it only
> seems to happen when IMAP is served by the same system) but that
> was tried and didn't help.


That's exactly right - outlook uses session IDs from IMAP in SMTP
connection (I've seen it in pcap). I thought about using different
hostname for imap but it would require updating certs and I didn't want
to wait for this (plus it requires change on all clients, reentering
passwords etc). Additionally I don't know if outlook's cache is hostname
based or IP-based (in latter case hostname change wouldn't help).


> The upcoming 4.91 will revert to leaving the cache uselessly
> enabled; any knob will not appear before 4.92.


great :)

best regards
--
Marcin Gryszkalis, PGP 0xA5DBEEC7
jabber jid:mg@???