Hi Henning,
Twilek <twilek@???> (Mo 19 Dez 2016 15:42:36 CET):
…
> The error reads:
> 2016-12-18T18:40:08+00:00 ERR: HORDE [imp] only RSET accepted now
> only RSET accepted now [pid 32431 on line 1160 of
> "/var/www/webmail/imp/lib/Compose.php"]
> 2016-12-18T18:42:23+00:00 ERR: HORDE [imp] only RSET accepted now
> only RSET accepted now [pid 3074 on line 1160 of
> "/var/www/webmail/imp/lib/Compose.php"]
> 2016-12-18T18:42:23+00:00 WARN: HORDE [imp] PHP ERROR: fwrite():
> SSL: Die Verbindung wurde vom Kommunikationspartner zurückgesetzt [pid
> 3074 on line 92 of "/usr/share/php/Horde/Smtp/Connection.php"]
As Jeremy said, it may be related to CHUNKING, an SMTP extension.
Can you start the Exim server manually
exim -v -d-all+receive -bdf 2>/tmp/logfile
and try to reproduce the issue?
Maybe we need to ask you for a pcap dump of the unencrypted connection
between your SMTP client (horde) and the MTA.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko
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