Ongoing issues with Returned/Bounced Emails - Outlook.com blocked!

[usagiart]

Hi Hi TPG,

I am still having issues with sending emails from the TPG online Post Box.

Today I tried forwarding an old email to a @outlook.com email address that has worked successfully previously and it was returned from the Outlook domain with the following response. 

***Diagnostic-Code: SMTP; 550 5.7.1 Unfortunately, messages from [203.12.160.53] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150).***

I checked and 203.12.160.53 is the tpg web-mail IP so I can see why the Post Office emails are bouncing.

I resend the email from my mobile phone using its WiFi (non-TPG) and the email was received.

Can this please be resolved as I suspect this is one of the reasons for my hotmail emails being bounced too.

Thanks

Nat

[BasilDV]

Hi @usagiart

We'd like to check on this further with our Post Masters to confirm.

Shoot me a PM with your TPG username or customer ID number.

BasilDV

[usagiart]

Thanks BasilDV

I have sent you a PM with the details.

Nat