Re: [exim] TLS connection with Microsoft server stalls

Am 25.09.2020 um 13:50 schrieb Heiko Schlittermann via Exim-users:
> Christian Eyrich via Exim-users <exim-users@???> (Fr 25 Sep 2020 11:26:09 CEST):
>> Hi there,
>>
>> sadly I didn’t make progress with my GMX problem. But during my tests I came
>> across another problem.
>> I’ve sent mails from @outlook.de to my server but the TLS encrypted
>> communication just stops at one point after some progress through EHLO, MAIL
>> FROM, RCPT TO (exim -bd -d+all):
>>
>> 10:04:45 15402 SMTP>> 250 Accepted
>> 10:04:45 15402 tls_write(0x558a49151ac0, 14)
>> 10:04:45 15402 gnutls_record_send(SSL, 0x558a49151ac0, 14)
>> 10:04:45 15402 outbytes=14
>> 10:04:45 15402 DSN: orcpt: NULL flags: 0
>> 10:04:45 15402 Calling gnutls_record_recv(0x558a4920e660, 0x558a494e9000,
>> 4096)
>>
>> Then after 300 seconds the connection is closed.
>
> Isn't that the "cork" issue that was fixed around
> 8f9adfd36222d4e9e730734e00dffe874073e5b4,
> which is not part of 4.92. I do not remember the pre-conditions to
> trigger this bug, I believe, it was related to pipelining, wasn't it?

Hit and sunk. Disabling pipelining helped.
Thank you. I’ll see if I'll leave it disabled or just to that for the MS
servers.

Regards,
Christian