Question

Outbound mail (SMTP port 25) seems to be blocked by your network | Mail in a Box

Hi, I have been using Mail in a Box for a while now and it was all working fine but suddenly it stopped working.

I checked the “System Check” section on Mail in a Box’s Admin Panel and it says “Outbound mail (SMTP port 25) seems to be blocked by your network. You will not be able to send any mail. Many residential networks block port 25 to prevent hijacked machines from being able to send spam. A quick connection test to Google’s mail server on port 25 failed.”

Please help.

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Accepted Answer

Your best bet is going to be opening a support ticket.

https://cloudsupport.digitalocean.com/s/createticket

Regards

Simon - SnapShooter

Hello there,

It is possible that port 25 is closed. This is something DigitalOcean has been doing to reduce spam on their network. Please do not think that they are accusing you of sending spam, it is more that they 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. To qualify for the ability to send out emails, DigitalOcean requires accounts to wait 60 days before they can look into removing the restriction. Once your account has reached 60 days of stable use, please do reach back out to the DigitalOcean support team so they can look into this for you.

In the meantime, you could use port 587 instead.

Regards, Alex

Hi

i sent a ticket but your support team did’t answer after 3 days.

Just another quick update. I am running three droplets (one relatively large one) and ran into the same with a new small droplet we wanted to use internally. (roughly 5 email accounts) I created a support ticket and the support staff told me that they are unable to lift this restriction for my account… Instead they suggested to use a different port or an external API.

I think this restriction should be highlighted better on the page where you choose a droplet.

Best regards,

Jan