> > Normally when a client connection is reject by my sendmail server, > > the client is notified of the Reject message and the client server > > is generating a NDR. This is listed in my log as [1] however when I > > send a virus it looks like sendmail is not reporting the reject back > > to the client server. How should I 'enable' this? > > This isn't a ClamAV question, more one about Sendmail configuration > and MTA/client behaviour.
I am not sure about this, also because I have no knowledge of how the communication between the MTA and the milter is handled. I think it could be related to the way the reject is being done by the milter. I have a bit of experience with mailfromd and if I reject a message there the MTA processes it correctly but different from clamav-milter. > If I've understood what you've said you want, and your configuration, > it all seems OK. Both log snippets show a rejection in replies which > are made to the client. > > They do not however show any NDR, they're just parts of the client/MTA > conversation which starts with "connect from" and can be terminated by > the MTA more or less at any point during what follows, right up to the > final '.' on a line on its own. If the MTA terminates with a 4xx code > or 5xx code the message[*] is considered rejected (respectively either > temporarily or permanently) and the client MAY take some optional text > attached to the reply by the MTA and use it in an NDR which it creates > for return to the originator of the mail. In this case the MTA does > not create the NDR, it's up to the client, correct! I am only working with this setup. > If the MTA actually accepts the message but later on finds that it's > undeliverable then according to the RFCs it must create an NDR itself > (but that doesn't appear to be the case in either of your examples). correct! the frontend servers know what can be relayed. > If you're thinking about what are sometimes called 'bounce' messages, > where a message is received (and accepted) by an MTA and it promptly > replies to that message with one of its own saying that the message > has been dropped in the trash can, then please don't do that because > it will likely add to the problems caused by the original message. Indeed, I noticed somewhere in clamav or clamav-milter there was a '--bounce' option. And I was wondering if it really generates a message or it is facilitating the reject function. _______________________________________________ clamav-users mailing list clamav-users@lists.clamav.net https://lists.clamav.net/mailman/listinfo/clamav-users Help us build a comprehensive ClamAV guide: https://github.com/vrtadmin/clamav-faq http://www.clamav.net/contact.html#ml
