Hi @hyerbury ,
Welcome to the community!
Thanks for raising this to us. We'd like to confirm if the affected e-mail is from TPG or Hotmail? Also the troubleshooting you have done.
In the event that the affected e-mail address is TPG try to check this article that you may find helpful.
Cannot Send Email Rejected by the Server/Banned from using SMTP
You may also try to perform a reboot on the modem/router and leave it turn off for 3mins.
Let us know how it will go.
Regards,
@hyerbury wrote:
For the past two or three weeks, I get these message undeliverable notices from hotmail - see below. Can anyone suggest how I solve the problem? Thanks
Action: failed
Status: 5.7.1
Diagnostic-Code: SMTP; 550 5.7.1 Unfortunately, messages from [203.12.160.131] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [BN7NAM10FT068.eop-nam10.prod.protection.outlook.com]
Last-Attempt-Date: Wed, 30 Jun 2021 19:49:21 +1000
