Hi list, I have been running the Shupp Toaster for some time. My current version is 0.7.10, running on redhat 9.
I have been receiving a few entries in my qmail log which appear a little dubious to me. They look like the following example, taken from today: # tail /var/log/qmail/current | tai64nlocal [snip] 2005-06-08 15:33:07.619543500 info msg 8225097: bytes 2214 from <> qp 28395 uid 89 2005-06-08 15:33:07.639654500 starting delivery 7816: msg 8225097 to remote [EMAIL PROTECTED] 2005-06-08 15:33:07.639657500 status: local 0/10 remote 1/20 2005-06-08 15:33:13.133576500 delivery 7816: failure: Connected_to_[a_remote_ip]_but_sender_was_rejected./Remote_host_said:_501_#2 175005_Syntax_error_in_parameters_or_arguments/ [/snip] The only substitutions I to the above were: - substituted domain of hill.h@ email address for [domain] - substituted the remote ip address for [a_remote_ip] both to protect the innocent... My concern is that to me, this log reads as though some outside party attempted to send a mal-formed message without a return address field through our mailserver, and succeeded. It appears that it was up to the destination mailserver to drop the message (for some reason)... if this is true, then wouldn't this mean unwanted parties can relay through our server by doing whatever was done here? It looks like the relay succeeded, but the remote server simply didn't like the message... if something shows up in their logs, they will have record that the message came through my server no? Any advice would be much appreciated, as this has me a little worried... David.
