Issue Plesk email delivrability / ERS-Customized-Block

[Erwan]

Server operating system version

Centos 6.10

Plesk version and microupdate number

18.0.31

Hi all,

We have received email rejection messages on a plesk domain for a reason that we do not know:

<user@to-domain.com>: Recipient address rejected: Mail from
<ip_plesk_server> was refused due to the sender IP found as
ERS-Customized-Block. (in reply to RCPT TO command)

MX and SPF ok.
IP is clean with know operators.
No problem with this ip or domain so far.

Does anyone have any info on "ERS-Customized-Block"?

Thank you.

Erwan

 

[IgorG]

Does anyone have any info on "ERS-Customized-Block"?

I suppose it is Email Reputation Service: Trend Micro Email Reputation Services
This article may be useful: DCX