Follow the given guidelines from bouncemessage.

Otherwise, you could think about the chances of an ant fighting an
elephant or an hippo.

Willi


Am 26.10.2017 um 12:33 schrieb Poliman - Serwis:
> 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.
> 

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