For my ISV I'm using SmarterMail on my VPS. Everything works fine, except the fact that the SmarterMail service is very memory hungry. Right now it is setup to handle 2 domains and a handful accounts, and it allocates 250 MB. From my point of view it's a little bit too much. The SmarterMail service is by far the most memory hungry process on my VPS right now. And I run a handful of IIs app pools and SQL Server.
Can anyone recommend a good alternative?
- Runs on 64bit Windows Server 2008
- Can handle DKIM/DOmainKeys
- Reasonable easy to set up
- IMAP support