SMTP Limits

[timtrott]

I seem to have one client (a Chamber of Commerce) that insists on sending large email attachments to hundreds of addresses at once which creates problems with server SMTP and Qmail Queue.

I have asked several times that they discontinue the practice and send links to files instead of file attachments but I am being ignored. Is there any way to limit the SEND file size or the NUMBER of addresses they are sending to from one single host domain? Is that control a feature of an upcoming PSA update (8.1+?). Do I have any option other than turning off their web site or email?

I hate to lose a customer but CoLo support costs me $75 every time they jamb up the works and I have to ask for help. The server is a dual proc, DDR2, so it's not a matter of server horsepower.

 

[wagnerch]

echo "5242880" >/var/qmail/control/databytes

If you want to set the maximum message size to 5MB.

 

[timtrott]

The problem is that I would like to restrict a specific client from sending a 2 meg attachment to 500 addresses while still allowing others to send a single 6 meg file if needed. I'm not sure your suggestion would accomplish that and I'm not sure what I'm asking for is even possible.

 

[wagnerch]

You could build a qmail-spp plugin to analyze the RCPT header, unfortunately with qmail-spp you cannot analyze the DATA section (size).

http://qmail-spp.sourceforge.net/

Plesk has qmail-spp plugin capability, you just have to follow the interface and build your own plugin.