Do most company email infrastructures support / use SMTP?

Do most company email infrastructures (e.g. Exchange Server) support and/or use SMTP to send email? One of the requirements of my application is to send status emails f开发者_如何学Pythonrom the application. Is it enough to support SMTP or should I be looking at some other protocols as well?

The first part of your question belongs on serverfault. However, I'll answer here.

Q. Do most company email infrastructures support and/or use SMTP to send email?
A. Yes, ALL of them do. That's how email is sent... at least to external servers. Internally, mail servers just shuffle the mail between local accounts, which is proprietary and usually not exposed for any other purposes.

Q. Is it enough to support SMTP or should I be looking at some other protocols?
A. How else would you send email? (Rhetorical)

You might be thinking about POP3 or IMAP. Both of which are used by clients to contact a server to receive emails. However, everything uses SMTP to transfer mail around.

SMTP is THE protocol to receive and forward emails. As far as I know, every mail-server supports it, at least externally. Maybe Exchange only accepts them on "external" ports and has an own protocol for the outlook clients.