SMTP timeout

  • Posted on December 22, 2013
  • insideguiAsked by insidegui

Followed the instructions here:

I can receive e-mail but when I try sending e-mail to any address (tried gmail, icloud, etc) the logs show something like this: “connect to[]:25: Connection timed out”

If I try to telnet It says “Trying…” and hangs.

My server is new, iRedMail is the only thing i’ve installed.

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I contacted support, apparently they do block SMTP from new clients, I had to send them a copy of my ID to unblock It. Now It’s working. <br> <br>Thank you

Digital ocean should clarify and add a reminder when you have to deal with SMTP.

I just contacted the support to know why my was always timed out.

They asked me the following informations :

  1. Your name.
  2. What business or individual you are going to send mail on behalf of as well as their website (if one exists).
  3. What kind of mail you’re going to be sending (password resets, newsletters, marketing mail, transactional mail such as order confirmations).
  4. If you’re sending on behalf of a business or an individual that is not yourself, what is your relationship to that business or individual.

And then : “After giving some informations about the purpose “Thank you for reaching out to us. I am passing this ticket over to our Trust and Safety team for further review.””

There’s definitely a lack of transparency here, so, add me to that list.

I had this working for years on a server and all of a sudden without any announcement it was blocked/failed.

It’s also non-obvious and under-documented that it’s possible for IPv6 mail to be completely blocked even if IPv4 isn’t (so, even if you think you’re in the clear because things work where you tested, you can end up with periodic failures if you’re dealing with somewhere that has IPv6 mail servers in their DNS rotation like say Office365 or Gmail).