Re: [SOGo] External SMTP with user auth

Pfennig Wed, 14 May 2025 08:02:22 -0700

Thats good to know! I thought it would be something like "AUTH PLAIN <base64 string>"

The logs show, that the 334 is send, but the client then quites. Is it possible to further debug this? Like, what is the Syntax error?


S: plain auth extension supported.
C: AUTH plain
2025-05-14 16:55:33.135 sogod[103:103] SMTP: reply has invalid format (334)
C: QUIT
S: <SMTP-Reply: code=501 line='Syntax error in parameters or arguments'>


On 14/05/2025 16:55, qhivert ([email protected]) wrote:


/“SOGo sends an empty "AUTH PLAIN"”///

That’s ok from the spec https://datatracker.ietf.org/doc/html/rfc4954#section-4


SOGo only send the AUTH PLAIN, server should reply with a code 334

Then sogo send the credentials.


So my guess is that your smtp server doesn’t support that.

--

Quentin Hivert || Alinto || R&D Lead Developer

19 Quai Perrache 69002 Lyon

www.alinto.com <http://www.alinto.com>

*From:*[email protected] <[email protected]> *On Behalf Of *Pfennig

*Sent:* mercredi 14 mai 2025 16:38
*To:* qhivert ([email protected]) <[email protected]>
*Subject:* Re: [SOGo] External SMTP with user auth

Thank you for the input. Especially

> Yes I will use the email instead of the uid but with the user password still.


this is important to know. I was doubting that.

Unfortunately, it is still not working. I also tried setting the master user, but I am not sure, whether it works or not. How can I trigger an action, that would use the master user instead of the normal user?

As stated in my first message, SOGo sends an empty "AUTH PLAIN" request to the mail server. Is it possible to see the SOGo part of that interaction? Maybe the mail field or the password field is not properly set due to using LDAP?


Thanks in advance!

On 14/05/2025 09:13, qhivert ([email protected]) wrote:

    /“SOGoForceExternalLoginWithEmail parameter might be of interest.
    What is not clear to me from the documentation is whether, apart
    from using the primary email address of the user, it will also use
    the user's password to authenticate.”/

    Yes I will use the email instead of the uid but with the user
    password still.

    Quentin Hivert || Alinto || R&D Lead Developer

    19 Quai Perrache 69002 Lyon

    www.alinto.com <http://www.alinto.com>

    *From:*[email protected]
    <mailto:[email protected]><[email protected]>
    <mailto:[email protected]>*On Behalf Of *Odhiambo Washington
    *Sent:* mardi 13 mai 2025 18:42
    *To:* [email protected] <mailto:[email protected]>
    *Subject:* Re: [SOGo] External SMTP with user auth

    Hi,

    If your SMTP server is external and requires authentication, then see:

    
https://www.sogo.nu/files/docs/SOGoInstallationGuide.html#_smtp_server_configuration

    SOGoForceExternalLoginWithEmail parameter might be of interest.
    What is not clear to me from the documentation is whether, apart
    from using the primary email address of the user, it will also use
    the user's password to authenticate.

    But you can use a master user as the documentation says:

    ```

    If your mail server requires use of SMTP AUTH, you can use the
    following parameters in the configuration file :

    SOGoSMTPMasterUserEnabled = YES;
    SOGoSMTPMasterUserUsername = "foo";
    SOGoSMTPMasterUserPassword = "bar";

    ```

    On Tue, May 13, 2025 at 6:52 PM Pfennig <[email protected]> wrote:

        Hi!

        I am not using postfix, but planned to communicate directly
        with my
        external (hosted) mail server via SMTP. The credentials are
        the same
        everywhere and seem to be working, since the IMAP is working
        and I can
        see my emails.

        But maybe I am misunderstanding something. No mails can be
        send in
        general, also no notification with the SMTPMasterUser...

        The SMTP is tested and works with PLAIN auth with the
        credentials, that
        I also use for login.

        On 13/05/2025 17:23, qhivert ([email protected]) wrote:
        > Hello,
        > Could you share the postfix log?
        > Is the username/password for your smtp the same as for your
        ldap/imap server?
        >

    Best regards,
    Odhiambo WASHINGTON,
    Nairobi,KE
    +254 7 3200 0004/+254 7 2274 3223

     In an Internet failure case, the #1 suspect is a constant: DNS.
    "Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-)

    [How to ask smart questions:
    http://www.catb.org/~esr/faqs/smart-questions.html
    <http://www.catb.org/~esr/faqs/smart-questions.html>]

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Re: [SOGo] External SMTP with user auth

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