# Basic terms

**URL:** https://forum.dmarcian.com/t/basic-terms/1222
**Category:** FAQ
**Created:** [April 13, 2020, 1:49pm UTC](https://forum.dmarcian.com/t/basic-terms/1222 "2020-04-13T13:49:56Z")
**Posts on this page:** 1
**Showing post:** 1

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### Author: ![cronnin](https://avatars.discourse-cdn.com/v4/letter/c/9de0a6/32.png) [@cronnin](https://forum.dmarcian.com/u/cronnin)
#### Post date: [April 13, 2020, 1:49pm UTC](https://forum.dmarcian.com/t/basic-terms/1222/1 "2020-04-13T13:49:56Z")

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Can anyone explain what these services actually do? I tried to make a list, correct me if I’m wrong?

MX = MR …eceive (who receives email for the domain)  
SPF = MS …end (who sends email for the domain)  
DKIM = MK …ey (email public key for the domain)  
DMARC = MFA (fail action)

Also, how do these entities relate with each other in case you want to use more email services on your domain (or even subdomains - [example.com](http://example.com), [blog.example.com](http://blog.example.com) )? For example Office, Sendpulse and your own mail server. How will the entries look like?

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