Free SMTP Server Software

[Spacecadet]

Doesn't IIS include an SMTP server? It used to... How to: Install and Configure SMTP Virtual Servers in IIS 6.0

Good point! Thanks Nick, will investigate tonight

[Sysman]

Probably not relevant in a sandboxed environment but if it's public facing, a poorly configured SMTP server can be a nightmare, I did one once and unwittingly it was an open relay, ended up with 6 million mis-deliveries, God knows how many went through delivered properly....

Demon warned me....

WSS. I once configured one which came with relay switched on by default. Before I'd waded through enough documentation to find out how to switch it off, someone had found the relay and started using it.

Fortunately I looked at the logs before my ISP noticed, and disabled it at the router until I got the config sorted.

[bobspud]

WSS. I once configured one which came with relay switched on by default. Before I'd waded through enough documentation to find out how to switch it off, someone had found the relay and started using it.

Fortunately I looked at the logs before my ISP noticed, and disabled it at the router until I got the config sorted.

As the others have said. Open, unauthenticated relays are a strict no no. It will get discovered and flooded with traffic from spammers and then your domain/firewall external ip addresses will get blacklisted and your real email will get killed.

You can knock up a fairly stable smtp service using a virtual machine, damn small Linux and a few additional deb packages. You can then configure the server to take the messages but not send them.

Out of interest why are you testing with an unauthenticated server surely in production the server wont be an open relay?

[vetran]

use IIS smtp.

Lock it down to only receive from one IP address etc (option in config).

use Blat to test and keep it handy in a bat file when you doubt the server is working. Or test via telnet if you have face hair and sandals.

[DimPrawn]

As vetran says, MS IIS SMTP server.

Set the authentication to Windows, and limit the IP address to the sender machine IP address.

No worries about spam relay.