Problem to send email to hotmail

Mail
1

I always use EM CLIENT with workplace email ,
This week, when trying to send emails to hotmail, through EM CLIENT it gives an error and does not send, however, if I use my email server, works correctly.
Does anyone know what may be causing the problem?
Thank yu so much !

2

Can you give the error?

3

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its

recipients. This is a permanent error. The following address(es) failed:

[email protected]]

host hotmail-com-olc-protection-outlook_com []

SMTP error from remote mail server after pipelined MAIL FROM:<[------------@-------------t]> SIZE=4653:

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 [BN7NAM10FT015.eop-nam10.prod.protection.outlook.com]

4

I already tried to unblock our ip in the hotmail blacklist, but at the end of the process he indicated that he was not there.

5

So you need to contact your Internet provider as the error says, because Microsoft is banning you from connecting through that provider.

6

Thank you soo much,
But email works correctly on other email servers (webmail, gmail) only in EMcliente this error happen