One of the checks enabled by default in CHKUSER tries to reject fake
senders, so if the domain declared in the address does not have an MX
entry it is obvious the sender is fake (100%).
Are your users conscious they are using an address which does have not a
DNS MX entry?
sample.secureserver.net does not have an MX, so when checking for a
"legal" sender, this address is rejected.
Tell your users to use a not_exiting user in a exiting_MX_domain. So
probably [EMAIL PROTECTED] (or [EMAIL PROTECTED]) where
the domain does exist but the mailbox does not seems to be more safe.
You can also exclude the check, but I suggest not to do (also because
the most of receiving servers will make the same check)
Tonino
Bill D'Anjou ha scritto:
I have a chkuser question as well. I'm getting the following message
related to some legitimate mail which my server needs to pass thru:
@4000000047817ef31d2e7f44 CHKUSER rejected sender: from
<[EMAIL PROTECTED]::> remote
<k2smtpout04-01.prod.mesa1.secureserver.net:unknown:64.202.189.166> rcpt
<> : invalid sender MX domain
People at the subject domain seem unwilling - or unable - to make the
DNS entry necessary to fix the problem. Regardless, if there's a way to
"whitelist" a known/"permitted" domain, I suppose it wouldn't hurt to
save on DNS "overhead."
I've tried simply putting an entry in my server's hosts file... I
thought that would work but seem to be finding that the hosts file
doesn't behave in the manner I thought it did. Bottom line, I still
can't make the domain resolve/chkuser pass the mail.
Any suggestions? Preferably one that doesn't require recompiling. I'm
"squeamish" about doing that on a production server :)
Thank-you in advance,
Bill
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 10, 2008 6:15 AM
To: toaster@shupp.org
Subject: [toaster] CHKUSER
I need a little help deciphering what's going on here.
CHKUSER accepted sender: from <[EMAIL PROTECTED]::>
remote
<DG93MCB1:unknown:IP_Address_of_allowed_relay> rcpt <> : sender accepted
I'm getting a ton of these in my log files but the user CHKUSER is
reporting is not sending them. I tried commenting them out of my
tcp.smtp file and resetting the tcp.smtp.cdb but I'm still getting the
same log.
Any help would be greatly appreciated.
Thanks
Doug
--
------------------------------------------------------------
[EMAIL PROTECTED] Interazioni di Antonio Nati
http://www.interazioni.it [EMAIL PROTECTED]
------------------------------------------------------------
