What do you use to send/receive email for your Web App ?
I just wanted to know how people here at Hacker news handle email for their web applications.
However, if you're hosting on ADSL, the IP address of your mail server is probably blacklisted, so you may have to configure your MTA to forward messages to your ISP's MTA. I found this easiest to configure in Sendmail, which can be configured to co-exist with other MTAs.