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by jtoscani 2145 days ago
Hello, I'm part of the Linode staff and wanted to help clear this up. The reason we block SMTP ports is to prevent spam email abuse from new accounts. This applies to all new accounts in every datacenter.

The blog post shared by detero sums it up, and while this is also mentioned in some of our documentation, it can easily be missed if you don't need those documents during setup (linked below for reference). We're currently working on making this information more readily available on our customers' Cloud Manager page to increase awareness of these filters.

We've responded to your ticket, too, but let us know if you have any other questions.

https://www.linode.com/docs/email/running-a-mail-server/