Blog

Short post here but too much for twitter. I've had an issue sending mail from my Gmail account to 2 Microsoft hosted emails addresses this week. Here is the bounce I get.

This is an automatically generated Delivery Status Notification

Delivery to the following recipient failed permanently:

xxxxxxxxxxx@msn.com

Technical details of permanent failure: PERM_FAILURE: Gmail tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 SC-004 Mail rejected by Windows Live Hotmail for policy reasons. A block has been placed against your IP address because we have received complaints concerning mail coming from that IP address. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, we recommend enrolling in our Junk E-Mail Reporting Program (JMRP), a free program intended to help senders remove unwanted recipients from their e-mail list: http://postmaster.live.com (state 13).

The first time this happened it was to an msn address. The next time to a Hotmail address. Do you think someone is using their Gmail account to send spam or is it more likely Microsoft is just blocking mail from Gmail users?

I sent the same email again but used my custom domain on my Gmail account instead of my normal Gmail address. The mail went through fine. Both emails should have come from the same ip address, they were sent less than a minute apart but the one with the source address @gmail.com got rejected. Post a comment if you've experienced this also or if you have an opinion.