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Courier to Dovecot and folder subscriptions

Discussion in 'E-mail Discussions' started by nino, May 21, 2013.

  1. nino

    nino Member

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    Hi,

    First, I'm sorry if this questions have already been answered before, but I just have to be extra sure before doing anything on my server.

    We have a server suffering from overloads and I believe it's related to Courier Imap. When the loads goes up (sometimes above 150) I see lot's of processes related to imap. The courier imapd itself, lots of "php-cgi" called from webmaild and so.

    Many people suggests that we change the imap server from Courier to Dovecot. The problem is that most of our users, if not all of them, uses folders subscriptions and there lies my questions.

    Question 1 - If I change the option on cPanel to use Dovecot will it convert the folder subscriptions or will I get my phone ringing with customers asking "Where's my folder"?

    Courier uses a file called "courierimapsubscribed" inside each mail foder. Will cPanel convert this file to Dovecots format? Which I don't know how it is our how it works...

    Question 2 - If cPanel does not care about converting anything and just changes the "imap authenticator", what will happen to these Courier files? "courierimapsubscribed" and the folders will be wiped out?

    Question 3 - What exactly does cPanel do when we change these options?

    Thanks.
     
  2. nino

    nino Member

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    Forgot to mention, I'm using "WHM 11.36.1 (build 6)" on a "REDHAT Enterprise 6.4 x86_64 standard"
     
  3. Infopro

    Infopro cPanel Sr. Product Evangelist
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    Twitter:
    On the Mailserver selection page in WHM:
    WHM » Service Configuration » Mailserver Selection

    It states this:

     
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