Soon I’ll be launching my new site and i was planning on using gmail as the email server for things like registration and lost password.
I’ll be using google apps (free version) so I can have admin@mydomain.com.
Besides the 500/day limit are there any other potential problems with using gmail for this service?
2 Years im using gmail apps + phpmailer, never had a problem (except the 500 limit as you mentioned).
Emails take (on my experience) not more than 1-2 seconds to be sent; Just remember to use ssl on port 465.
And noone of my emails is been market as a SPAM