False positive blacklist - problems receiving emails

[zanin]

First, sorry for my English.

When trying to send mail to my email account configured in VestaCP, get a delivery failure message.
In error, it is informed that the IP is on a blacklist:
host my.domain.tld[X.X.X.X] said: 550 Rejected
because X.X.X.X is in a black list at bl.spamcop.net (in reply to RCPT TO command)

I tried sending through three different companies, all the tests, I get the same message.
I checked the site spamcop.net and IPs tested are not listed.

I deleted the contents of the file /etc/exim4/dnsbl.conf and the server still reports that my IP is blacklisted:
host my.domain.tld[X.X.X.X] said: 550 Rejected
because X.X.X.X is in a black list at (in reply to RCPT TO command)

Would someone help me please?

Tks
Zanin

[Milka]

Apparently the IP your server is on was or is used to send spam. First, make sure it isn't, then contact spamcop for removal off the list..

[zanin]

The error message says that is listed, but searching directly on the site www.spamcop.net the IP is not on the blacklist.