I just created my first Linode and I can’t send emails. Why? (Mailing ports 25, 465, and 587 blocked by default)
In an effort to fight spam, new Linode accounts created after Tuesday, 5 November, 2019 have mailing ports (25, 465, and 587) restricted by default (see our blog post here for more information). If you would like to use your Linodes for sending email, you will first need to configure (1) a valid DNS A record and (2) rDNS for any Linodes that you plan to use to send emails. Our guides on configuring DNS and rDNS records within the Linode Manager are linked below:
Once your DNS configuration is complete, we ask that you simply open a Support ticket and provide us with some basic information about your mailing set-up:
- Which Linode(s) will be used for mailing?
- Can you confirm that your mailing practices are CAN-SPAM compliant?
If you have any additional questions, just reach out in a ticket!
Does the A record have to be hosted on Linode's DNS manager or can it be hosted elsewhere as long as it and the rDNS match?
You won't need to use Linode's DNS Manager if you prefer to use your registrar or a third party service. We can verify your records using commands like
dig -x to ensure they match up. You can read more about these methods here.
The title of this post is misleading and almost caused me to skip it. It should be called "Mailing ports (25, 465, and 587) blocked by default". Also, this is a major change that might have gone out as a special notice to us. I will defer further comment to the appropriate places.
Thanks for taking the time to let us know about your experience with this Community Post. It really helps us make sure that we're getting the information where it needs to go effectively.
At your request, we edited the title of this post to clarify.
Please let us know how else we can help out!
Linode Support Team
At first glance, it might not be obvious whether the message is about incoming or outgoing mail traffic.
Consider this opening statement:
Beginning Tuesday, 5 November, 2019, in an effort to fight spam, outgoing mail traffic from new Linode accounts with destination ports 25, 465, and 587 are restricted by default (see our blog post here for more information).