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Cloudron Forum

Apps | Demo | Docs | Install

Outbound SMTP issue

Scheduled Pinned Locked Moved Solved Support
mailcontaboport 25smtp
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  • Q Offline
    Q Offline
    q__nt_n
    wrote on last edited by
    #1

    Hi,
    I want to used my contabo VPS with Cloudron as Build-in SMTP server for one of my domains.
    But I have this issue :
    8eedf501-09c9-4b1d-8f47-17b5864ffd1c-image.png

    I contacted Contabo support who told me that port 25 was not blocked on their VPS and to test commands

    netstat -tulpen
    

    This is result :

    439e814e-ecc7-4690-8c3c-19bb533858a2-image.png

    From what I understand, port 25 is indeed listening... but that still doesn't allow it to be used as an email server.

    Could you help me please ?

    Thanks

    girishG 1 Reply Last reply
    0
  • girishG Offline
    girishG Offline
    girish Staff
    replied to q__nt_n on last edited by
    #2

    @q__nt_n Issue is not listening to port 25 but connecting to outbound port 25.

    Just SSH into your server and run telnet port25check.cloudron.io 25 . Does it connect ? Output should be like this:

    ~# telnet port25check.cloudron.io 25
    Trying 165.227.67.76...
    Connected to api.cloudron.io.
    Escape character is '^]'.
    works
    Connection closed by foreign host.
    
    1 Reply Last reply
    0
  • Q Offline
    Q Offline
    q__nt_n
    wrote on last edited by
    #3

    @girish
    It's not working

    image.png

    girishG 1 Reply Last reply
    0
  • girishG Offline
    girishG Offline
    girish Staff
    replied to q__nt_n on last edited by
    #4

    @q__nt_n The VPS blocks port outbound 25. You have to reach out to contabo again and tell them that you can't connect with the above command.

    1 Reply Last reply
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