Crypted Smtp Login User And Password, Crypted smtp login user and password

[yartax]

Hi

I've got an interesting issue. I've been reporting several AUTH=EFAIL:TYPE=LOGIN errors while sending mails. The sender is an Sql server Mail agent, but I can't understand while mails are delivered ok, an error is reported. So I captured a TCP session to review process. Can someone explain why is reporting error?

I've ofuscated a bit personal data.

220 mail.myserver.pri <1354534126.2867837840@mail.myserver.pri> [XMail 1.25 ESMTP Server] service ready; Mon, 3 Dec 2012 12:28:46 +0100

EHLO SQLSERVER
250-myserver.pri
250-VRFY
250-ETRN
250-8BITMIME
250-PIPELINING
250-AUTH LOGIN PLAIN CRAM-MD5
250-SIZE 20602880
250 STARTTLS
AUTH login YWxlcnRhc0BoaXBvdGVscy5iaXo=
334 UGFzc3dvcmQ6
KioqKio=
503 Authentication failed
MAIL FROM:<notify@myserver.pri>
250 OK
RCPT TO:<someone@myserver.pri>
250 OK
DATA
354 Start mail input; end with <CRLF>.<CRLF>
Sensitivity: Normal
Importance: Normal
MIME-Version: 1.0
From: Notify<notify@myserver.pri>
To: someone@myserver.pri
Reply-To: no-reply@hipotels.biz
Date: 3 Dec 2012 12:27:30 +0100
Subject: 03/12/2012--Some Info
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: base64


DQpoYWJpdGFjaW9uIGVzdGFkb2hhYiBmZWNoYVVsdGltYUVzdGFuY2lhICAgIA0KLS0tLS0t
.....trimed


.

250 OK <S1922EF>

[Sob]

Sender tries to authenticate and it fails (bad username or password). But because the recipicient is in domain handled by server, there's no authentication needed, e-mail for local domains is accepted from anyone by default.