Re: [exim] Diagnosing problems authenticating as a client

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Autor: Heiko Schlittermann
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A: exim-users
Assumpte: Re: [exim] Diagnosing problems authenticating as a client
Boylan, Ross via Exim-users <exim-users@???> (Di 09 Jul 2019 01:52:23 CEST):

> 14:55:44 SMTP>> AUTH LOGIN
> 14:55:44 cmd buf flush 12 bytes
> 14:55:44 read response data: size=18
> 14:55:44 SMTP<< 334 [gibberish]
> 14:55:44 SMTP>> ****************************
> 14:55:44 cmd buf flush 30 bytes
> 14:55:44 read response data: size=18
> 14:55:44 SMTP<< 334 [different gibberish]
> 14:55:44 SMTP>> ************************


The gibberish is probably something like "Username" and "Password",
but base64 encoded. Try `openssl base64 -d <<<GIBBERISH`

> 14:55:44 cmd buf flush 26 bytes
> 14:55:50 read response data: size=81
> 14:55:50 SMTP<< 535 5.7.3 Authentication unsuccessful [BYAPR04CA0001.namprd04.prod.outlook.com]
> 14:55:50 login authenticator yielded 2
> 14:55:50 LOG: MAIN
> 14:55:50 login authenticator failed H=SJC-efz.ms-acdc.office.com [52.96.3.178] 535 5.7.3 Authentication unsuccessful [BYAPR04CA0001.namprd04.prod.outlook.com]
> 14:55:50 SMTP>> MAIL FROM:<Ross.Boylan@???> SIZE=1623


Hm. Why does your side continue sending the data, even the
authentication didn't succeed? If you know that outlook.com doesn't
accept unauthenticated connections, you can use hosts_require_auth in
the transport talking to outlook.com


I'd try using swaks

    swaks -tls -a login -au $username -ap $password -f $sender -t $recipient \
        -s 52.96.3.178 \
        -q auth


or similar (I didn't test the command line yet). This should reveal if
you can authenticate with them at all. And then, as step 2, use this
auth data in your Exim configuration.


    Best regards from Dresden/Germany
    Viele Grüße aus Dresden
    Heiko Schlittermann
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