members.linode.com blacklisted?
Outlook.com is bouncing emails from my server with:
"outlook-com.olc.protection.outlook.com[104.47.45.33] said: 550 5.7.1 Unfortunately, messages from [x.x.x.x] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140)."
I checked the blacklists to see all my servers are getting listed by both hostname and IP. I checked a couple of random linodes that are not mine and I see the same blacklists (RFC-Clueless, Hostkarma, Spam Group Net)
Here is an example:
http://multirbl.valli.org/lookup/45.33.23.244.html
http://multirbl.valli.org/lookup/45.33.8.206.html
So far I have only had issues with outlook.com (365 emails still work). I am not sure what to do to resolve this, it seems like all linodes are on the same blacklists…
1 Reply
mjones
Linode Staff
Many mail service providers, and some RBLs, will block or list IP addresses that are sending mail but don't have rDNS set up, and aren't included in the sending domain's SPF record.
In most cases your Linode's IP address will be automatically delisted from these block lists and RBLs after setting up rDNS and SPF records. We have a guide on setting up rDNS here and an intro to SPF records here.
It can take a bit of time, sometimes longer than a day, for automatic delisting to occur. If you find your IP address is still listed after setting up rDNS and SPF records, open a ticket and we'll be happy to take a look.