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Does DigitalOcean block port 25?

Last updated on September 25, 2022 @ 1:33 pm

DigitalOcean does not block port 25. In fact, we encourage the use of port 25 for both security and performance reasons. Many services, such as PostgreSQL, use port 25 for communication. Blocking port 25 would prevent these services from connecting to each other, which would slow down your server.

PRO TIP: DigitalOcean does not block port 25. However, we recommend that you use a different port for email services. Port 25 is often used by malicious programs to send spam emails. If you use port 25 for your email service, your server may be blacklisted and you will not be able to send or receive emails.

Additionally, many services, such as Sendmail, use port 25 to send email. Blocking port 25 would prevent these services from communicating with your email server, which would slow down your email delivery.

Morgan Bash

Morgan Bash

Technology enthusiast and Co-Founder of Women Coders SF.