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Apps | Demo | Docs | Install

Quick question about email

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  • A Offline
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    abargel
    wrote on last edited by girish
    #1

    I realize that this must be quite basic, but I am new to this! ๐Ÿ˜‰
    I set up Cloudron email a few days ago and everything worked fine. But then I started using OpenVPN on my computer and now I cannot send emails (but can receive). If I turn the VPN off, it works.
    Nothing else has changed, the DNS are still green ๐Ÿ˜‰
    What do I need to do?

    nebulonN 1 Reply Last reply
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  • A Offline
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    abargel
    replied to girish on last edited by
    #0

    @girish Oh, never mind, it was an SMTP OUT block by the VPS provider... I didn't think that it would apply to running email from another server through OpenVPN on this one...
    Sorry for taking your time with this, and thanks again.

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  • nebulonN Offline
    nebulonN Offline
    nebulon Staff
    replied to abargel on last edited by
    #2

    @abargel just to clarify, you are using OpenVPN to connect to the internet via the Cloudron OpenVPN app? And the issue is, that a desktop email client is unable to send emails via the mail server on your Coudron?

    Are there any errors, timeouts or warnings shown?

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  • nebulonN nebulon marked this topic as a question on
  • A Offline
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    abargel
    replied to nebulon on last edited by
    #3

    @nebulon I am using a separate Open VPN instance (on another VPS). Yes to the desktop email client (Evolution), in which I have configured the Cloudron mail server.
    The error message is: โ€œCould not connect to my.XXX.net: Connection refusedโ€
    Thank you!!

    nebulonN 1 Reply Last reply
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  • nebulonN Offline
    nebulonN Offline
    nebulon Staff
    replied to abargel on last edited by
    #4

    @abargel can you check if you can connect to the smtp port in question 587 ? Not sure how your tunnel is setup and works, but if IMAP (receiving) works, then I suspect this is some special firewall setting when using the tunnel on either the tunnel side or your OpenVPN client configs.

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    abargel
    replied to nebulon on last edited by
    #5

    @nebulon Well, Evolution "sending mail" is set up to port 465 with TLS over a dedicated port. The instructions say 587 or 465 and I don't know the difference...
    I'm not sure what is a tunnel not how it is setup...
    My OpenVPN client is the Cloudron app as well, just on a separate server (which does not allow SMTP OUT, by the way) so a separate Cloudron account as well.
    Hope you can make sense of this, I realize that there are gaping holes in what I understand and therefore can tell you!

    A girishG 2 Replies Last reply
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  • A Offline
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    abargel
    replied to abargel on last edited by
    #6

    @abargel *nor how it is setup

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  • girishG Offline
    girishG Offline
    girish Staff
    replied to abargel on last edited by
    #7

    @abargel said in Quick question about email:

    The instructions say 587 or 465 and I don't know the difference

    Port 587 is STARTTLS. Port 465 is TLS.

    Can you try "telnet my.xxx.net 465" on your PC after connecting to VPN? Does it connect ? This could also be an IPv6 related issue, but let's see what telnet says.

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    abargel
    replied to girish on last edited by
    #8

    @girish telnet says "Unable to connect to host: connection refused".
    Without the VPN, telnet connects.
    It's the same from both my computers, on which I use VPN from the same server.

    girishG 1 Reply Last reply
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  • girishG Offline
    girishG Offline
    girish Staff
    replied to abargel on last edited by
    #9

    @abargel Can you try "telnet -4 my.xxx.com 465" just to make sure it's IPv4 ? I wonder if this might be a client side VPN issue - what OS is your client?

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  • A Offline
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    abargel
    replied to girish on last edited by
    #10

    @girish Same results. I'm on Ubuntu (different versions) on both computers.

    girishG 1 Reply Last reply
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  • girishG Offline
    girishG Offline
    girish Staff
    replied to abargel on last edited by
    #11

    @abargel Do port 587 (starttls) , 443 (https) , 80 (http) work? Or do all fail?

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  • A Offline
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    abargel
    replied to girish on last edited by
    #12

    @girish 80 and 443 work, 587 doesn't

    girishG 1 Reply Last reply
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  • girishG Offline
    girishG Offline
    girish Staff
    replied to abargel on last edited by
    #13

    @abargel mmm. Just to double check, can you check if all traffic is indeed going via the VPN ? (curl https://ipv4.api.cloudron.io/api/v1/helper/public_ip)

    Next step to debug after confirming above:

    • Open Web terminal in VPN app.
    • Run the telnet commands on different ports. I suspect things are failing here too. If so, then there is some routing issue.
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  • A Offline
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    abargel
    replied to girish on last edited by
    #14

    @girish The curl command gives this (first with VPN off, then VPN on) The second IP is indeed that of my VPS where OpenVPN is.

    minipc@minipc-iPC45:~$ curl https://ipv4.api.cloudron.io/api/v1/helper/public_ip
    {
      "ip": "91.163.111.16"
    }minipc@minipc-iPC45:~$ curl https://ipv4.api.cloudron.io/api/v1/helper/public_p
    { 
      "ip": "91.199.223.67"
    
    

    Running the telnet command in the Web terminal gives the same results as before.

    On my end, I tried checking the open ports on that VPS with "ss -tunlp" and it seems that ports 465 and 587 are not open, but 80 and 443 are. I tried opening the port with "nc -lk 465" command, but nothing happens. In doubt, I opened a ticket with the VPS provider asking if they can open port 465. Waiting for answer.

    Other thought was, do I need to enable email in Cloudron that is on that VPS, so that the ports for email are open?

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    abargel
    replied to girish on last edited by
    #15

    @girish Oh, never mind, it was an SMTP OUT block by the VPS provider... I didn't think that it would apply to running email from another server through OpenVPN on this one...
    Sorry for taking your time with this, and thanks again.

    1 Reply Last reply
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