vishesh kumar:
> fatal: btree:/var/lib/postfix/postscreen_cache: unable to get exclusive
> lock: Resource temporarily unavailable

Wietse:
> You can't share one /var/lib/postfix/postscreen_cache.db
> file with more than one postscreen process.
>
> How many main.cf/master.cf files are there on your system?
>
> Instead of /var/lib/postfix, use $data_directory to avoid
> file sharing conflicts.

vishesh kumar:
> I have only one main.cf and one master.cf .
> Also if i can't share  /var/lib/postfix/postscreen_cache  then what options
> i have ?

You can share it via the memcache protocol.

http://www.postfix.org/POSTSCREEN_README.html
http://www.postfix.org/DATABASE_README.html
http://www.postfix.org/memcache_table.html

        Wietse

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