The suggestion to bug Microsoft are correct, I would also bug the
support team at the receiving end of this.
From the SpamCop.net website:
<quote>
The SCBL aims to stop most spam while not blocking wanted email. This is
a difficult task. It is not possible for any blocking tool to avoid
blocking wanted mail entirely. Given the power of the SCBL, SpamCop
encourages use of the SCBL in concert with an actively maintained allow
list of wanted email senders. SpamCop encourages SCBL users to tag and
divert email, rather than block it outright. Most SCBL users consider
the amount of unwanted email successfully filtered to make the risks and
additional efforts worthwhile.
The SCBL is aggressive and often errs on the side of blocking mail. When
implementing the SCBL, provide users with the information about how the
SCBL and your mail system filter their email. Ideally, they should have
a choice of filtering options. Many mailservers operate with blocking
lists in a "tag only" mode, which is preferable in many situations.
</quote>
SpamCop admits to being aggressive and sometimes errors on the side of
blocking mail. Based on SpamCop's policies, I would suggest that the
receiving side of this equation should use the SpamCop listing as part
of a spam scoring system rather than use SpamCop as a blocking RBL.
Lyle Giese
On 2/15/24 01:32, Christopher Hawker via mailop wrote:
Hello all,
I am attempting to send mail from a M365 tenancy, however, we are
seeing issues with it being filtered due to the address appearing on
bl.spamcop.net.
/"Decision Engine classified the mail item was rejected because of
IP Block (from outbound normal IP pools) -> 550 mail from
40.107.107.97 refused, see http://www.spamcop.net - Your mail
provider is blocked because is sending SPAM."/
If there is anyone on-list from Microsoft, could you please take a
look? It's causing issues 🙁
Thanks,
Christopher Hawker
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