Understanding Dovecot IMAP and Maildir

Maildir (run by Courier IMAP or Dovecot) is a mail format used in conjunction with an MTA to store email on the server as separate files within folders. This post covers Courier IMAP as a service, not in terms of mail client usage. Directory Structure A user’s email is store in ”’/home/user/mail/<domain>/<emailuser>/…”’. Below is a…

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cPanel Out of Memory Errors

I’ve seen several features of cPanel appear to malfunction, and upon reviewing /usr/local/cpanel/logs/error_log, I’d see something similar to this: Out of memory during request for 2180 bytes, total sbrk() is 130234368 bytes! Common places this has been known to occur: In Webmail (Horde and Roundcube) when opening large attachments Using cPanel’s perl module installer You…

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