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Adress blocked, not in blacklist


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For several days we have received blocked smtp address notifications.

Diagnostic-Code: smtp; 554 5.7.1 Service unavailable; Client host
    [our IP] blocked using bl.spamcop.net; Blocked - see
    http://www.spamcop.net/bl.shtml?our IP

After checking, our address does not appear in your blacklist What can we do to make our emails no longer blocked?

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if you start at https://www.spamcop.net/spamstats.shtml you can get to


It has been observed that sometimes ISPs use a standard "SpamCop blocklist" reason for rejecting an email even when they have used some other reason, i.e. updated their filter but not bothered to update their canned message.

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