1 )deleting files older than 32 days
find /var/spool/asterisk/{voicemail/default,monitor} -type f -mtime +32 -delete
2) create a cron job that executes this command weekly, you can open the crontab configuration file for the meladmin user by running the following command
crontab -u meladmin -e
3) Then add the following line to the file
0 0 * * 0 find /var/spool/asterisk/{voicemail/default,monitor} -type f -mtime +32 -delete
4) To modify the meladmin user to be able to delete files created by Asterisk, you can add the meladmin user to the asterisk group by running the following command
usermod -a -G asterisk meladmin
5) make the Voicemail blast available from extensions, you can add the following lines to your [login to view URL] file
exten => 123,1,VoiceMailMain(blast)
exten => 123,n,Hangup()
This will create an extension (123) that calls the Voicemail blast when dialed. Replace "blast" with the name of the Voicemail blast you want to use.