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Strand Games is having ongoing problems with
hotmail.com, Microsoft are rejecting all emails to this domain from
This will be a problem if you're trying to register on the forum with a hotmail email address.
Emails are rejected with the following;
said: 550 5.7.1 Unfortunately, messages from [18.104.22.168] 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
[VE1EUR01FT046.eop-EUR01.prod.protection.outlook.com] (in reply to MAIL
Apparently Microsoft operate their own system whereby they don't like anyone running their own independent mail server. See here.
Are you sending email from new IPs?
IPs not previously used to send email typically don't have any reputation built up in our systems. As a result, emails from new IPs are more likely to experience deliverability issues. Once the IP has built a reputation for not sending spam, Outlook.com will typically allow for a better email delivery experience.
Additionally our IP address is not on any blacklist, check.
We have contacted Microsoft here but as yet there is no resolution.