mmap() failed with index cache file - dovecot

[kurian_dsquare]

Hello,We are using WHM Cpanel 11.28.86 with dovecot as IMAP/POP server. We have a folder in an email account with more than 65000 emails. Now whenever we try to access this email account, through Squirrel Mail or Mail client like Kmail, in /var/log/maillog, we are getting message,

Nov 13 12:06:37 neoteric01 dovecot: IMAP(support@______.com): mmap() failed with index cache file /home/123abc12/mail/_______.com/support/.Dealt With/dovecot.index.cache: Cannot allocate memoryNov 13 12:06:37 neoteric01 dovecot: IMAP(support@______.com): mmap() failed with index cache file /home/123abc12/mail/_______.com/support/.Dealt With/dovecot.index.cache: Cannot allocate memory

We are not able to view email accounts and Squirrel mail is throwing

ERROR:ERROR: Connection dropped by IMAP server.Query: THREAD REFERENCES ISO-8859-1 ALL

The entry, mail_process_size in /etc/dovecot.conf is comented.Can someone guide me on what to do to fix this issue? Thank you in advance.

<br>Regards,

<br>Kurian.

[cPanelTristan]

Hello Kurian,

It could be the PHP memory limit in the php.ini for cPanel itself for the webmail programs. I'd point out how to do that, but it's highly possible the machine could crash if it uses too much memory.

The issue here is that no folder should have 65000 emails in it. I highly suggest copying the contents of that folder and zipping them up, then having the user trim down the contents or you trim it down for them.

I'd also consider updating cPanel to the latest version as you appear to be running a relatively older version. You can do that cPanel update with this command:

/scripts/upcp --force

Thanks!