Is there any way of asking Postfix if it thinks it is capable of
delivering a message to a particular email address, in real time?

With Exim installed, I could just do a
"sendmail -bv some.addr...@example.com" and check the exit code.
With Postfix installed, the exit code is always 0 and the result
of the lookup is emailed to me instead.

This functionality is very useful for doing "real time" email
address validation when email addresses are posted from web forms.

-- 
Mike Cardwell  https://grepular.com https://emailprivacytester.com
OpenPGP Key    35BC AF1D 3AA2 1F84 3DC3   B0CF 70A5 F512 0018 461F
XMPP OTR Key   8924 B06A 7917 AAF3 DBB1   BF1B 295C 3C78 3EF1 46B4

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