Server is a standalone one behind a wlan router, with static IP and no DHCP. Groupwaresolution is Groupoffice
Since Update I have these messages in /var/log/qpsmtpd/current
@400000005175312f05a3c384 4331 cleaning up after 497
@400000005175324f2bb47bf4 4322 tls plugin (init): ciphers: HIGH:!SSLv2
@400000005175324f2f2b5334 4322 Listening on 0.0.0.0:25
@400000005175324f2f2b5b04 4322 Running as user qpsmtpd, group qpsmtpd
@400000005175324f2f2b5eec 4322 Initializing spool_dir
@400000005175324f2f2b66bc 4322 Permissions on spool_dir /var/spool/qpsmtpd/ are not 0700
@400000005175324f2f2b6aa4 4322 size_threshold set to 0
@40000000517536b301269804 method Net::DNS::Header::nextid undefined at /usr/bin/qpsmtpd-forkserver line 292
@40000000517536b3018f77ac 4322 cleaning up after 5966
-------------------
the Tail of these messages
@400000005176502b1074c6b4 method Net::DNS::Header::nextid undefined at /usr/bin/qpsmtpd-forkserver line 292
@400000005176502b10f25354 4322 cleaning up after 2084
@400000005176502b11070fec method Net::DNS::Header::nextid undefined at /usr/bin/qpsmtpd-forkserver line 292
@400000005176502c10eb5e14 4322 cleaning up after 2085
Some suggestions ?