It's 2020, which SMTP MTA to use?

Reasoning in the comments, boosts appreciated!

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Maybe I should specify some requirements - needs to be able to hook in to modern anti-spam systems (SPF, DMARC, etc) ideally out of the box, support submission as well as delivery, support LDAP for auth, virtual hosting, have good support modern SMTP extensions like UTF8 and MTA-STS, be well supported by common NOC systems, etc, etc.

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