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cannot send email

Posts: 1
Registered: ‎04-11-2021

cannot send email

i am suddenly unable to send emails via my business to outlook and hotmail addresses.


Reason: 550 5.7.1 Unfortunately, messages from [] 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 []

Community Gaffer
Community Gaffer
Posts: 25,915
Thanks: 9,539
Fixes: 1,512
Registered: ‎21-04-2017

Re: cannot send email

Thanks for your post @rob16 and welcome to our Community Forums.

I'm sorry to see you're having issues sending emails.

Can you drop me a private message with the full headers and bounce back we can take a closer look?

From 31st October 2022, I no longer have a regular presence here as I’ve moved on to a new role within Plusnet.
 Anoush Mortazavi