Microsoft’s live.com is rejecting emails this morning, generating the same error as noted previously in this problem.
said: 550 5.7.1 Unfortunately, messages from [22.214.171.124] werent sent.
Please contact your Internet service provider since part of their network
is on our block list (S3140). You can also refer your provider to
[BN8NAM11FT027.eop-nam11.prod.protection.outlook.com] (in reply to MAIL
There’s nothing obvious listed against
mxtoolbox.com. I don’t know what else to do except report it here.
We have been trying to get any response from microsoft and this is what we got:
As previously stated, your IP (126.96.36.199) do not qualify for mitigation at this time. I do apologize, but I am unable to provide any details about this situation since we do not have the liberty to discuss the nature of the block.
At this point, I would suggest that you review and comply with Outlook.com’s technical standards. This information can be found at https://postmaster.live.com/pm/postmaster.aspx.
We regret that we are unable to provide any additional information or assistance at this time.
Outlook.com Deliverability Support
So basically “We blocked you, won’t tell you why. Have a good day”