Hey,
just wondering if anyone has benchmarked the various MTA's? a company I am doing work for is mail blasting there email updates(hundreds of thousands) and they are using 4 IIS mailers to relay the mail from some little SQL app that pulls the email from there database and sends it to the mailers.
I recently asked them if they considered something like sendmail or qmail but this is an MS shop, so I was going to pop up a sendmail server and replace one of the IIS mailers to see how it performs, but I wanted to know if anyone else has tried this or soemthign similar qmail, sendmail etc....

I know your subject line SAYS "no spam"....but really? Hundreds of thousands of mail messages per day, and it's NOT spam?

A brief Google search turns up an MTA benchmark test from April, 2010
http://www.dt.e-technik.uni-dortmund...ix/bench2.html

Not doubting you, but then again, I've no way of knowing this is (or isn't) a spam server, so I'm hesitant to offer more. Put up a Linux box, and test them out....

Yah, I know it sounds like spam, but I work for a company that runs a MS dev site. They have 7 million users and they send out a mail blast with updates from the website every day. I have a history with Linux, rather than MS and this being an MS shop they have been using IIS to send out there mail blasts to its users. I am setting up a couple of ubuntu VM's right now to benchmark it agains the IIS server, just wondering if anyone has done such tests before.

Here are some (very old) test results with postfix vs. qmail:
http://www.dt.e-technik.uni-dortmund...x/vsqmail.html

I'd recommend just sticking with what you know, and optimize as needed for your requirements. (i.e. If you know qmail, performance should be adequate given proper hardware.)

My company does mail routing.
We send up to 30 millions mail a day, using a hundred of Postfix instances on ~30 servers.

Does about a million messages a day for a regular server.

Alright we are spammers but this is not our crap, just our system