topic Why is outlook.com blocking a Bell SMTP server address for email? in Internet

Why is outlook.com blocking a Bell SMTP server address for email?

tuxking2000 — Wed, 18 Sep 2024 18:18:16 GMT

Tried to send email to an address at outlook.com using smtp.bellnet.ca as my relay and received:

The server responded with "550" - "550 5.7.1 Unfortunately, messages from [204.101.250.106] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol Filter Agent][AGT=PFA][MxId=11B9A3946664379E] [BL02EPF0002992B.namprd02.prod.outlook.com 2024-09-18T00:21:18.891Z 08DCD1CA3BE2EFC7]\r\n"

204.101.250.106 is part of the domain's spf record and my domain's as well since we send out via this SMTP server. what is going on? Thanks for any help about this.

Re: Why is outlook.com blocking a Bell SMTP server address for email?

Vanadiel — Wed, 18 Sep 2024 19:12:10 GMT

You might want to look here.

Re: Why is outlook.com blocking a Bell SMTP server address for email?

tuxking2000 — Wed, 18 Sep 2024 19:22:51 GMT

Thank you Vanadiel, that explains it, but how does this get fixed? Over time the IP address reputation will go back up and get removed? And MAYBE outlook.com will allow messages from this relay again?

Re: Why is outlook.com blocking a Bell SMTP server address for email?

Vanadiel — Wed, 18 Sep 2024 19:29:51 GMT

I think Bell would have to fix this. You likely would have to talk to someone at Bell business services to get this resolved.