Hi there everyone,
i am facing a problem with my mail server,
i get an error when sending mail to a specific domain group;

Aug 18 06:41:02 mycompany2 sendmail[16745]: n7I1Ab9m016743: mail.xyz.in.: SMTP DATA-2 protocol error: 571 Delivery not authorized, message refused

Aug 18 06:41:02 mycompany2 sendmail[16745]: n7I1Ab9m016743: to=<feedback@xyz.in>, delay=00:00:25, xdelay=00:00:24, mailer=esmtp, pri=166397, relay=mail.xyz.in. [xxx.xxx.xxx.xxx], dsn=5.5.0, stat=Remote protocol error

please help on the same asap..
thanks in advance.

Hi,

As the message states: protocol error: 571 Delivery not authorized, message refused. You are not authorized to send mail using that server. If you administer the destination server you'll have to add your server/ip to the allowed ones or provide correct authentication. If you don't administer the destination server, you'll have to take it up with the admin that does.

And please don't use words like asap. What's urgent to you is not to us, we're all volunteers.

Kind regards,

Eric

Thank You ERIC for your kind & quick reply.
but is it sure the problem is not from my side...??
Thanks anyways!

Since you have to authenticate then the problem is either on your side if you're not providing the correct credentials or on the other side if the other server doesn't accept your connection. Both ways can cause the error. If you have to authenticate providing a user name you could try the connection with a telnet session. If you don't have to provide credentials are you allowed to relay to that host?

Kind regards,

Eric

no..i am sure i am providing the correct credentials,
any other way to check the problem from my side??
i got this problem from the last 2 weeks,
previously the mail was delivered correctly..

Are you by any chance connecting to Hotmail, Gmail or something like that? And if so are you using a dynamic WAN IP?

Also, try
and see if you can access the server with your credentials.

Kind regards,

Eric

no i am not connecting to gmail/hotmail,etc;
yes i can telnet to my smtp_host with my credentials,
...???

Are you behind a static WAN IP or a dynamic one? Is the destination server using RBL lists?

Kind regards,

Eric

Yes i am on a static WAN IP...
i was once listed in URIBL,but was delisted too,again today i was listed on the same.
m not sure that RBL is causing a problem as previously when i was listed for 2-3 days the mails were delivered.

Strange, I don't know much more to try. If you can access the server using telnet and send a mail from the console in that same telnet session, then you can exclude the credentials.

OK, you'll have to go through your smtp logs to find out what commands you're sending and what responses you're receiving and debug from there on to find the error.

You also might want to set your loglevel a bit higher in order to get more info. Once you set your loglevel, restart your sendmail, try sending a mail from a telnet session (all the steps) and after that the normal way you do. Then check your logfile for errors/communication.

Kind regards,

Eric

Thank You for all your help...
but is there anyway that the mails are not getting delivered because of my domain being listed in URIBL.

Thanks & Regards,
Varun.

If your domain is blacklisted then that is the most likely option. Get 'deblacklisted' and try again (I believe it might take up to 48 hours to propagate).

Kind regards,

Eric