Exim4 and "550 smtp auth required" error

[Spheerys]

Hi,

My serveur manage the domain domain.com

A desktop user which running Thunderbird, is using the SMTP of his ISP (he don't using the server's smtp for some pertinent reasons).
The SMTP outgoing server is authentified by SSL, on 587 port.

When the user, owner of the mailbox [email protected], send a email to anybody, it's working without problem.
But if [email protected] try to send a message to [email protected], it received an error message like this :

Code: Select all

        This is the mail system at host slow1-d.mail.gandi.net.
    I'm sorry to have to inform you that your message could not
    be delivered to one or more recipients.
    
                      The mail system
    
    <[email protected]>: host domain.com[213.xxx.xxx.xxx] said: 550
    smtp auth requried

Yes, the writing error is real on "requried" ;)

And on exim4 log I have this :

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    2016-04-13 12:06:42 H=slow1-d.mail.gandi.net [217.xxx.xxx.xxx] F=<[email protected]> rejected RCPT <[email protected]>: smtp auth requried

What's going wrong ?

[Spheerys]

OK I have found the cause : Exim restrict submission from own domain to hosted domains.
But how can I change this setting on the exim4 template ?

[Spheerys]

Here is my exim template : http://pb.spheerys.fr/?1254ba20dfb388fc ... 8o/r0QEDs=

[Sanity]

hi, I have no such problems that you have, do you want me to send my file exim4.conf.template? and testing?

[skurudo]

That all because of the next ACL rule:

Code: Select all

deny message = smtp auth requried
     sender_domains = +local_domains
     !authenticated = *

But you can't disable it because your MX become an open relay for every message sent from your domain. The best solution is to submit directly from client to the MX. While port 25 can be blocked by ISP ports 465 and 587 sould be opened for SMTPS/SMA. You have to configure clients properly. (c) http://serverfault.com/questions/770016 ... ired-error