my IP has been blocked some time ago for some valid reason. My email-server, running on a Virtual Linux Server, has been used as a relay for spam, and even as a source, using IP "0.0.0.0" as a destination.
Up to my knowledge, this problem is fixed. At least in my logs, I can not veryfy, that spam is still sent or relayed. However, I am still blocked, and spamcop tells me:
Causes of listing
System has sent mail to SpamCop spam traps in the past week (spam traps are secret, no reports or evidence are provided by SpamCop)
The time for delisting does not decrease, stayes just below 24h, so I suspect, that I am re-listed and re-listed gain, without knowing the real cause.
The only idea, which I have: In the logs I see a lot of unsuccessful (?) tries to relay some spam, like
Feb 28 20:28:36 h123456 postfix/smtpd: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 554 5.7.1 <535_lee_f_benson[at]kcc.com>: Relay access denied; from=<eric.peoples_er[at]sprint.ca> to=<535_lee_f_benson[at]kcc.com> proto=ESMTP helo=<wxs.nl>
Feb 28 19:35:59 h123456 postfix/smtpd: warning: numeric domain name in resource data of MX record for seed.net: 0.0.0.0
Feb 28 19:35:59 h123456 postfix/smtpd: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 554 5.7.1 <umtaida[at]seed.net>: Recipient address rejected: Access denied; from=<yang-nico[at]hotmail.com> to=<umtaida[at]seed.net> proto=SMTP helo=<ppp-217-77-221-14.wildpark.net>
May be, it is not correct to "reject" the mails, could this be the reason of being blocked ?