You might want to see which of your clients are causing this behaviour
--srs
From: mailop on behalf of Vaibhav via mailop
Sent: Thursday, March 18, 2021 7:03:52 AM
To: mailop
Subject: [mailop] Reg. Virginmedia SMC Policy Violation bounce error
Hi,
We'
If you want to share the IP(s) you're sending from I might be able to
provide more specifics for you but it's all about backing off, reducing the
volume of data you're trying to send and the amount of recipient network
resources you're trying to use up.
On Thu, 18 Mar 2021 at 01:34, Vaibhav via m
Hi,
We're an ESP sending emails on behalf of clients who are receiving the
following bounce error from virgin media domains (blueyonder.co.uk,
ntlworld.com, virginmedia.com) across multiple different domains and IPs:
SMTP Error : *421 4.2.0 MXIN618 Temporary SMC Policy Violation detected,
retry l
