Hi Richard,
You cannot see anything probably because I've requested another delisting. This morning our ip has been blacklisted again. (I checked at http://ipremoval.sms.symantec.com)
In our mail server log there are plenty of these records:
Mar 16 10:28:51 xxxxx postfix/smtp[27929]: 4ED3980811: to=<xxxx@yyyyyy.zzz>, relay=aaa.bbbbbb.cc[999.999.999.999]:25, delay=3.8, delays=3.1/0/0.72/0, dsn=4.7.1, status=deferred (host aaa.bbbbbb.cc[999.999.999.999] refused to talk to me: 554 5.7.1 You are not allowed to connect.)
Please, keep in mind that
1) Symantec the only to blacklist our mail server.
2) There's no spam coming out from our mail server
3) There's no virus on our mail server
4) Our mail server is not an open relay
5) Our mail server has not a dynamic IP
6) Our mail server does not allow authentication on port 25 but only on port 587
Please help us to understand what else is missing on our mail server because this issue is costing us a lot of time and money
Thank you in advance
best regards
Marco