DoveCot vs Cyrus-Imapd Performance

[Aleksandar Milivojevic]

Les Mikesell wrote:
> On Thu, 2005-01-13 at 14:32, Aleksandar Milivojevic wrote:
> 
> 
>>The only thing that is more complicated, IMHO, is if you already have 
>>users, and mail folders are in different format.  Than you need to 
>>migrate it into the Cyrus. 
> 
> 
> And what if those users already have existing .forward or .procmailrc
> files?  Can you maintain compatibility when you switch?  Does delivery
> still work with the sendmail 'plussed' addresses (user+tag) for
> addresses that aren't picked off by a matching .forward+tag file?

Simple stuff from .forward (mail forwarded to another mail address), no 
problemos.  Just move it into Sieve.  Vacation program called from 
.forward, no problemos either.  More complicated stuff, such as users 
calling custom mail filters, won't work.  Those usually require user 
accounts anyhow, and that is something to avoid on big installations 
(actually, anything bigger than home installation, no custom mail filter 
programs, IMO).

Procmail stuff, user's will have to rebuild that from scratch using 
Sieve.  Another possibility is keeping procmail, and calling Cyrus 
deliver program directly from it (instead as sendmail mailer).  Some 
people are doing it, and it works.  For simple procmail stuff, some 
automation tool could be written, but I wouldn't count on it being too 
reliable.  Sieve isn't as versatile as procmail.  However, majority of 
people are using it just to sort mail into different folders on the 
server.  Something Sieve is perfectly capable of doing.

Plussed addresses should work with Cyrus.  It is possible to configure 
Cyrus so that username+something will go to user's INBOX.something 
folder.  If plussed address is to be forwarded, it can be done using Sieve.

-- 
Aleksandar Milivojevic <amilivojevic at pbl.ca>    Pollard Banknote Limited
Systems Administrator                           1499 Buffalo Place
Tel: (204) 474-2323 ext 276                     Winnipeg, MB  R3T 1L7