I run 2-3 large sites/domains, each on a separate VPS.
Each VPS/domain then uses it's local sendmail to outbound email (also used for bulk outbound email, such as newsletters). For inbound email I typically buy a mail server and hook it up via a webmail app hosted on my VPS.
In summary: outbound mail via local sendmail on VPS and inbound mail via mail server that I buy as a separate service.
Now due to the recession I can see that there is a lot of money to be saved by merging the 3 VPS' into a large cloud VPS or dedicated server.
However I am unsure how to deal with the mail issue. Since sendmail (when setup correctly) can only send mail from one domain, how would I deal with one VPS hosting multiple domains/sites that all need to send outbound mails ?
How do you guys do it ?
Thank in advance for help.