Topic: 5.1.0 - Unknown address error 550-'Not supporting null...'

[miguelalbore]

A domain is trying to send an email to my SME Server 7. But when then try to send this they get an error:

The following message to <miguelalbores@mail.xxx> was undeliverable.
The reason for the problem:

5.1.0 - Unknown address error 550-'Not supporting null originator (DSN)'
 
The problem is that all the emails that it came from this domain are automatically rejected with this error. No problem with another domain. Which is the cause of this? Any idea?

Thank you for your help.

[CharlieBrady]

A domain is trying to send an email to my SME Server 7. But when then try to send this they get an error:

The following message to <miguelalbores@mail.xxx> was undeliverable.
The reason for the problem:

5.1.0 - Unknown address error 550-'Not supporting null originator (DSN)'
 

That message has nothing to do with SME server. It's from postfix. They need to talk to their IT support or their ISP.

[mmccarn]

http://forums.contribs.org/index.php?topic=31222.0

The last entry says you'll need to disable "dnsbl" or get the sending server to get itself de-listed with rfc-ignorant.

[miguelalbore]

Exactly, thank you mmccarn

It was because of you tell on msg. In Mexico it was so important because prodigy.net.mx one of the biggest ISP in our country has this problem.

http://mirror.contribs.org/smeserver/contribs/rmitchell/smeserver/howto/Spam%20blocking%20HOWTO%20using%20qpsmtpd%20&%20RBL%20for%20sme%20server.htm

I disable so this way:

config setprop qpsmtpd DNSBL disabled

Thank you