What SMTP email service would you recommend?

[Deepmartini]

Is it worth getting an external SMTP service? I am concerned that my forum messages might not get through or having to deal with spam issues, etc. What external SMTP service would you recommend? I found this one http://www.smtp.com lol but not many others. What ones do the bigger forums use?

 

[Jake Bunce]

Google is popular:

http://xenforo.com/community/threads/setting-up-google-as-smtp-server-for-your-xenforo.6180/