Bounces do not receive sender

[Thomas Luft]

Hi there,

I am using Kolab 3.4 since several years. Since some weeks I have a 
problem with mail bounces where the sender is not notified of the 
bounce. Here is a part of mail.log:

Jan 10 15:26:40 kolab postfix/qmgr[1675]: DCA451030AB: 
from=<t.luft at xxx.biz>, size=130350, nrcpt=1 (queue active)
Jan 10 15:26:40 kolab postfix/submission/smtpd[31811]: disconnect from xxx
.dip0.t-ipconnect.de[217.224.217.0]
Jan 10 15:26:40 kolab postfix/smtpd[31824]: connect from 
localhost[127.0.0.1]
Jan 10 15:26:40 kolab postfix/smtpd[31824]: B98E5103075: 
client=localhost[127.0.
0.1], orig_queue_id=DCA451030AB, orig_client=xxx.dip0.t-ipconnect.de[217.2
24.217.0]
Jan 10 15:26:40 kolab postfix/cleanup[31825]: B98E5103075: 
message-id=<b59099d8-
89af-45b6-b0d2-d6ce443813f5 at xxx.biz>
Jan 10 15:26:40 kolab postfix/qmgr[1675]: B98E5103075: from=<t.luft at xxx
.biz>, size=130407, nrcpt=1 (queue active)
Jan 10 15:26:40 kolab postfix/smtpd[31824]: disconnect from 
localhost[127.0.0.1]
Jan 10 15:26:40 kolab amavis[29579]: (29579-03) Passed CLEAN 
{RelayedOpenRelay}, [217.224.217.0]:62709 [217.224.217.0] 
<t.luft at xxx.biz> -> <tanja.weihnacht at yyy.de>, Queue-ID: DCA451030AB, 
Message-ID: <b59099d8-89af-45b6-b0d2-d6ce443813f5 at xxx.biz>, mail_id: 
VFXDZ0n0LzeA, Hits: -0.001, size: 130350, queued_as: B98E5103075, 576 ms
Jan 10 15:26:40 kolab postfix/smtp[31821]: DCA451030AB: 
to=<tanja.weihnacht at yyy.de>, relay=127.0.0.1[127.0.0.1]:10024, 
delay=2.3, delays=1.7/0.02/0.01/0.58, dsn=2.0.0, status=sent (250 2.0.0 
from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as B98E5103075)
Jan 10 15:26:40 kolab postfix/qmgr[1675]: DCA451030AB: removed
Jan 10 15:26:40 kolab postfix/smtp[31826]: B98E5103075: 
to=<tanja.w at yyy.de>, relay=127.0.0.1[127.0.0.1]:10026, delay=0.18, 
delays=0.05/0.07/0/0.06, dsn=2.0.0, status=sent (250 Ok)
Jan 10 15:26:40 kolab postfix/qmgr[1675]: B98E5103075: removed
Jan 10 15:26:41 kolab postfix/smtpd[31827]: connect from 
localhost[127.0.0.1]
Jan 10 15:26:41 kolab postfix/smtpd[31827]: 18990103075: 
client=localhost[127.0.0.1]
Jan 10 15:26:41 kolab postfix/cleanup[31825]: 18990103075: 
message-id=<b59099d8-89af-45b6-b0d2-d6ce443813f5 at xxx.biz>
Jan 10 15:26:41 kolab postfix/qmgr[1675]: 18990103075: 
from=<t.luft at xxx.biz>, size=130422, nrcpt=1 (queue active)
Jan 10 15:26:41 kolab postfix/smtpd[31827]: disconnect from 
localhost[127.0.0.1]
Jan 10 15:26:41 kolab postfix/smtp[31828]: 18990103075: 
to=<tanja.w at yyy.de>, relay=mail.zzz.de[2.14.20.1]:25, delay=0.82, 
delays=0.08/0.03/0.59/0.11, dsn=5.0.0, status=bounced (host 
mail.zzz.de[2.14.20.1] said: 550 #5.1.0 Address rejected. (in reply to 
RCPT TO command))
Jan 10 15:26:41 kolab postfix/cleanup[31835]: E9B831030F6: 
message-id=<20170110142641.E9B831030F6 at kolab.yyy.biz>
Jan 10 15:26:41 kolab postfix/qmgr[1675]: E9B831030F6: from=<>, 
size=2524, nrcpt=1 (queue active)
Jan 10 15:26:41 kolab postfix/bounce[31834]: 18990103075: sender 
non-delivery notification: E9B831030F6
Jan 10 15:26:41 kolab postfix/qmgr[1675]: 18990103075: removed
Jan 10 15:26:42 kolab lmtpunix[30901]: Delivered: 
<20170110142641.E9B831030F6 at kolab.xxx.biz> to mailbox: 
xxx.biz!user.thomas^luft
Jan 10 15:26:42 kolab lmtpunix[30901]: USAGE 
thomas.luft at postapotheke.biz user: 0.008000 sys: 0.008000
Jan 10 15:26:42 kolab postfix/lmtp[31836]: E9B831030F6: 
to=<thomas.luft at xxx.biz>, orig_to=<t.luft at xxx.biz>, 
relay=kolab.postapotheke.biz[/var/lib/imap/socket/lmtp], delay=0.13, 
delays=0.05/0.04/0/0.04, dsn=2.1.5, status=sent (250 2.1.5 Ok 
SESSIONID=<kolab.xxx.biz-30901-1484058402-1-15596329781177194231>)
Jan 10 15:26:42 kolab postfix/qmgr[1675]: E9B831030F6: removed

Does anyone have an idea why the bounce is not mailed to the sender address?

Kind regards

Thomas