I have a Statamic site that uses Postmark for email delivery. Sending mail works from my local build, but the same build can’t send mail on live. What could be different on my Digital Ocean server that is blocking mail from sending?
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Solved - it was a Redis queue that needed to be running.
Hi there,
If you are using port 25, keep in mind that it is closed for external uses for new accounts. There are a few ways to go about the problem with the best being to try using ports like 465 or 587 for SMTP.
To expand more on blocking port 25 for new accounts, is something DigitalOcean has been doing to reduce spam on its network. It is more that we simply cannot accurately determine who is going to send it.
Stopping spam is a constant fight, so DigitalOcean has implemented some restrictions on newer accounts. Having said that, you can always contact them and ask for the port block to be lifted on:
https://www.digitalocean.com/support/
More information here:
https://docs.digitalocean.com/support/why-is-smtp-blocked/
Dedicated email deliverability platforms are better at handling deliverability factors like IP reputation. To send mail from DigitalOcean, I could suggest using SendGrid or any other SMTP service provider:
https://marketplace.digitalocean.com/apps/sendgrid
Hope that helps!
Best,
Bobby