Re: match empty sender in hash: sender access map?

[Viktor Dukhovni]

On Sun, Apr 10, 2022 at 02:27:33PM -0400, Greg Klanderman wrote:

> Quick question, what is the correct syntax to match an empty sender in
> a hash: sender access map (i.e. check_sender_access)?

This is naturally documented in access(5), and also in postconf(5)
under:

    smtpd_null_access_lookup_key (default: <>)
       The lookup key to be used in SMTP access(5) tables instead of the
       null sender address.

-- 
    Viktor.