Hotmail is flagging MWeb emails as originating from Spammers

[PeterCH]

This has been going on for a while now, but when I try to send an email
to a hotmail.com account, I get:

SMTP error from remote mail server after MAIL FROM: SIZE=11128:
host mx1.hotmail.com [65.55.92.136]: 550 SC-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support

My emails do not contain links, just text. So it's not "spam-like characteristics".
Only sent to one Hotmail user at a time.

 

[Drake2007]

That's rich considering hotmail accounts are spammers haven.