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Thread: Ssl

  1. #1
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    Default Ssl

    form the outlook express client
    Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: '10.5.1.35', Server: '10.5.1.35', Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F


    any help

  2. #2
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    The default port for SSL SMTP is 465 I believe. Using 25 won't get you very far if you have SSL on.

  3. #3
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    I connect just fine using TLS/SSL over port 25

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    it works with 465

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    Quote Originally Posted by Bill Brock View Post
    I connect just fine using TLS/SSL over port 25
    Have you verified that it's in fact doing TLS, or do you perhaps have both TLS and cleartext enabled? Or do you do some DNAT/SNAT port translation, perhaps?

    I thought a client was doing TLS over 25 and then I discovered when I turned off "allow clear text login" they crashed. . .YMMV

    Dan

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    For it to "not allow plain text login" the login must be encrypted. TLS encryption takes care of that requirement. I use port 25 with SSL/TLS and do not use the encrypted password feature in Outlook and Outlook Express. If I don't use the SSL setting in outlook then the password goes across plain text and postfix will not allow the login. The login must be going across encrypted in this scenario or postfix wouldn't allow the login. It appears to me that postfix is allowing TLS over both ports 25 and 465.

    Thunderbird has to use port 465 with SSL/TLS.

  7. #7
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    Yes, I verified that I have "allow clear text login" unchecked.

    Plus if I turn off SSL in Outlook (which is using port 25 for both SSL and non-SSL) it won't login. Therefore I think it is safe to say that the connection is being made over SSL.

    Now Thunderbird is different. I have to set Thunderbird to port 465.

  8. #8
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    Actually, the plain text login is for POP3. It's the force TLS for the MTA.

  9. #9
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    Quote Originally Posted by Bill Brock View Post
    Yes, I verified that I have "allow clear text login" unchecked.

    Plus if I turn off SSL in Outlook (which is using port 25 for both SSL and non-SSL) it won't login. Therefore I think it is safe to say that the connection is being made over SSL.

    Now Thunderbird is different. I have to set Thunderbird to port 465.
    Which is probably why I thought it had to be 465, b/c most of my testing has been with Tbird. But I agree, if turning off SSL keeps you from logging in you're pretty safe to believe it's working!

  10. #10
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    You know Microsoft, they have to do everything a little different. :-)

    However, Outlook will work over 465 as well.

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