3cx smtp services



  • Hi, recently we have taken over a client that has 3cx onsite. The 3cx stuff is handled by a VOIP company and not us. We have the initial settings working fine. However, we are getting a message that the port 587 is timing out and they can't send an e-mail from the system.

    However after the first test fails, the next 10 go through fine. And get delivered.

    However if we try to send the official e-mail it never goes through because it has to work on the first attempt.

    I know the gmail works because they use it on another customers install and it is fine.
    I have opened SMTP by using this info https://vworld.nl/?p=3644

    However I have no idea how to get this one e-mail to go through on the first attempt. Has anyone dealt with this? Any ideas as to a resolution?

    Thanks so much!



  • @dpettigr said in 3cx smtp services:

    I have opened SMTP by using this info https://vworld.nl/?p=3644

    A rule for an outbound connection ?? Why ?
    LAN, by default, allows any IP to connect to any port using any protocol.


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