BT email server

[desktop]

Returned mail: Unfortunately, messages from [193.113.5.105] weren't sent. Please contact your Internet service provider since part of their network is on our block list (AS3150). You can also refer your provider to http://mail.live.com/mail/troubleshoot

My emails keep getting bounced from certain domains like yahoo & hotmail

[markp]

Hi there desktop,

we can have a look into this for you, if you are sending from a BT business email address.  If you contact the helpdesk we can get a few examples from you to allow us to investigate the problem.

Markp