Hi! i juste started to use mailcow and im trying to send an email from my mailcow server to my email in outlook but i cant see how i could acheive that. im trying to just send the message but its allways saying

connect to hotmail-com.olc.protection.outlook.com[104.47.49.33]:25: Connection timed out)

anyone can help me please it will help me alot :/

thank you all

  • diekuh

    • Community Hero
    • volunteer
    Moolevel 110
  • Post #2

Hi, seems like your provider blocks outbound connections on port 25.

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is there a way i can change the port 25 for an other port like 587 or 465?
dont know how i can acheive that on mailcow

  • MAGIC

    • Forum Staff
    • volunteer
    Moolevel 48
  • Post #4

You could change the port with some natting but then nobody can reach you.
Which provider do you use, maybe you can create a ticket and ask for unblock (likeDigitalocean does it afaik)

im just using a vm on my computer rn…

  • MAGIC

    • Forum Staff
    • volunteer
    Moolevel 48
  • Post #6
  • Edited

Well you shouldnt host a mailserver at home when you:
1.) dont have a static IP
2.) cant set a RDNS @ your ISP
3.) have closed ports

well if i just set my server on a DMZ and and reverse the dns on the ip of my server it might work?

  • MAGIC

    • Forum Staff
    • volunteer
    Moolevel 48
  • Post #8

I speak about the RDNS of your external IP

25 days later

I use a mail forwarder to overcome the port 25 block. Before I try to install mailcow I need to know if I can set the outbound to use a relay and change the inbound port, and how to do that. I know how to change it without using a docker image, but fairly new to using Docker, so if it seems like a dumb question, I apologize in advance.

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