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17.8 Configuration File Feature Reference | 619
the access database to also selectively reject envelope recipient addresses. This feature is
fully described in ?§7.5.5 on page 284.
17.8.11 FEATURE(block_bad_helo)
Reject clients with a bad HELO/EHLO hostname V8.14 and later
This feature rejects clients who provide a HELO/EHLO argument that is either unqualified
or one of the server??™s names. See ?§7.6.2 on page 292 for a full description of this feature.
17.8.12 FEATURE(compat_check)
Screen sender/recipient pairs V8.12 and later
Beginning withV8.12 sendmail, it is possible to screen email based on sender and recipient
address pairs stored in the access database. One use for such a method might be to prevent
one employee from receiving mail from another employee. Another use might be to prevent
a pseudouser, suchas admin, from receiving spurious reports from another user, such as
bin. Yet another use might be to reject spam mail to a mailing list.
FEATURE(compat_check) is described in full in ?§7.5.7 on page 288.
17.8.13 FEATURE(conncontrol)
Check SMTP RCPT TO: first V8.13 and later
FEATURE(conncontrol) allows you to use the access database to control the number of
simultaneous connections another machine may have to your server.* The number of
simultaneous connections allowed each interval is based on the setting of the
ConnectionRateWindowSize option (?§24.
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