= spam/対策/qregex =
について、ここに記述してください。

qmail-smptd 追加機能 [[/diff-files]]

https://notes.sagredo.eu/files/qmail/patches/qregex.README

Features of qregex include:

1. Performs pattern matching on envelope senders and envelope
   recipients against REs in the badmailfrom and badmailto control
   files. Two additional control files, badmailfromnorelay and
   badmailtonorelay, are used for pattern matching when the 
   RELAYCLIENT environment variable is not set.

2. Performs pattern matching on the helo/ehlo host name. Setting the
   NOBADHELO environment variable prevents the host name from being
   compared to the patterns in the badhelo control file.

3. Matches to patterns are logged. Setting the LOGREGEX environment
   variable causes the matched regex pattern to be included in the log. 

4. Matching is case insensitive.

5. qregex ignores empty envelope senders. An empty envelope sender is not
   compared to the patterns in the badmailfrom and badmailfromnorelay
   control files and is always accepted.