I have strange irritating problem. When I send emails from my server to any email address to any domain they reach the target without any problem. But when I try send to address in "hotmail.com" I got bounce: <d2windo...@hotmail.com>: host hotmail-com.olc.protection.outlook.com[104.47.40.33] said: 550 5.7.1 Unfortunately, messages from [ip_of_my_server] weren't sent. Please contact your Internet service provider since part of their network is on our block list (AS3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [CO1NAM03FT055.eop-NAM03.prod.protection.outlook.com] (in reply to MAIL FROM command)
I know that MS has own black list but why they block me. Domain which I use to send confirmation links is clear (checked in), ip address of my server also is clear. I can put some config files if needed. -- *Pozdrawiam / Best Regards* *Piotr Bracha*