Level 1: Cadet

Email to @bigpond addresses getting blocked as spam?

We use office365 to email our clients and as of this morning all messages to @bigpond addresses are getting blocked:


Error Details

Reported error:

550 5.7.350 Remote server returned message detected as spam -> 558 5.7.1 5D8928450462F4CC Message content rejected due to suspected spam. IB703

DSN generated by:


Remote server:



All messages are plain text and contain no links or attachments.


Nothing has changed in our setup and it has been working for years. Please help

Was this helpful?

  • Yes it was, thank you
  • No, I still need help
Level 5: Eagle Eye

Re: Email to @bigpond addresses getting blocked as spam?

Hi, Please getting in touch with Microsoft support team regarding this as I had similar issues and was able to fix it by contact them.

I am a Telstra Employee participating in CrowdSupport on my own time. My opinions are my own and not that of Telstra's. Please mark the response "Answered" if I was able to answer your query in anyway.
Level 25: The Singularity
Level 25: The Singularity

Re: Email to @bigpond addresses getting blocked as spam?

And forward a copy of one of the blocked emails, along with a brief description and contact details to postmaster@bigpond.com so that they can look into it.

Never be afraid to back yourself when trying new things, just always make sure you have 3 escape routes if things go wrong.

Set it & forget it

With direct debit there’s no need to give paying your bill another thought.

Avoid queuing up and never worry about late fees again.

Setup direct debit