On 3/30/2021 8:17 AM, SysAdmin EM wrote:
Hello,
I would like to know if there is any way to implement cache for the
smtpd_recipient_restrictions parameter?
I use MySql to store a table full of non-existent users, which I was
saving from email accounts that have been compromised by viruses on
the PC.
Any recommendation?
Regards,
It's not clear exactly what you're asking for...
Please clearly explain the problem you're trying to solve for more
specific answers.
Postfix should automatically reject unknown recipients without
needing a specific list to reject, unless these are valid recipients
that should not receive mail.
http://www.postfix.org/ADDRESS_CLASS_README.html
If your SQL lookups are too slow, look into optimizing that. Using
the postfix proxymap interface can help by consolidating connections
to the database.
http://www.postfix.org/proxymap.8.html
A step further would be to periodically dump your SQL data to a cdb
database. These scale to millions of records with very low latency
and low resource usage.
http://www.postfix.org/CDB_README.html
Or switch to LMDB.
http://www.postfix.org/LMDB_README.html
-- Noel Jones
