Outgoing email blocked rejected with code: 552 Message Rejected
I've just recently seen an issue where replies to just some (not all) emails are blocked from being sent with the following message:
552 Message Rejected
This only happens when I reply to an email from a few individuals (all from the same company) and only if I keep the original message included in the email
If I delete the content of the original message from the bottom part of my reply then it can be sent ok
If I compose a new message to the same recipients then it goes through ok
So it seems that when these problematic email addresses are included in the body of the email it then get rejected.
They are a legitimate new business - but I guess the PlusNet anti-spam system has somehow got them flagged as being "spam-like"
Is there a way to their rating reset so I can reply to these emails and keep the context/history of the conversation included?