What is different between smtp and pmta?

[kaspeRR]

Hey, I'm kinda confused about this email stuff. What's the difference between SMTP and PMTA? And do I need to use PMTA if I want my emails to actually land in people's inboxes?

 

[D•Jass]

Hey, I'm kinda confused about this email stuff. What's the difference between SMTP and PMTA? And do I need to use PMTA if I want my emails to actually land in people's inboxes?

SMTP is a general protocol used for email transmission by various email systems and PMTA is a specific commercial software.
SMTP provides the basic framework for sending emails, PMTA is used for large-scale email delivery.

No, You don't need to use PMTA only for it.