Blocking Invalid Addresses
Hello,
We are running the following version:
iPlanet Messaging Server 5.2 HotFix 1.16 (built May 14 2003)
libimta.so 5.2 HotFix 1.16 (built 12:32:17, May 14 2003)
SunOS angel 5.8 Generic_117350-21 sun4u sparc SUNW,Sun-Fire-V440
We are starting to see e-mails coming into the message store with a From: address that contains no domain. Example: yetdhfoep@
Is there something in the mappings file that we could put it to block this type of e-mail.
Thanks in advance
# 1
Hi,
can you post full headers of e-mail in question? Logs?
Also, may not be bad to look at this http://docs.sun.com/app/docs/doc/819-2650/6n4u4dtsb?a=view#bgava
It is posible to configure e-mail server to reject e-mail's with invalid domain in from field (we do this on firewall. Please note that you must allow blank sender <>)
# 2
Hi,
Please note that if the email has a From: address in the body of the email (as opposed to the envelope from address), then you will need to use something like a system sieve filter to block any such emails.
A full copy of the email (all headers) would be useful as noted already.
Regards,
Shane.
# 3
Noticing that 5.2hf1.16 is extremely OLD. . .
If I were running this server, I'd download and install 5.2p2 IMMEDIATELY, and if I had a support contract, I'd get the current bits.
I'd also be looking at upgrading to 6.2. . .
If the server is not a large one, and can handle some DNS performance hit, you might want to try the "mailfromdns" keyword. That checks that the "from" part is a valid domain, before accepting a message.
# 5
We found a workaround. What we did was in the ORIG_SEND_ACCESS mapping table, we added an entry of:
tcp_local|*@|*|*$N (Space is in front of tcp_local)
We have tested and this appears to be working.
Thanks for the help.
On another note, we are in the process of installing/migrating to 2005Q4. That is why we are not running the latest patch. We don't want to have to run testing in 2 environments.
Message was edited by:
panthers99
