[Dovecot] Some POP3 questions

[Nikolai Derzhak]

By the way, you can download ready to use open-source mail, calendar, contacts, etc: http://www.6zap.com.
I'am sysadm in this project and we use dovecot to.

On Wed, 05/06/2009 at 5:28pm, "Brandon Lamb" <brandonlamb at gmail.com> wrote:
> On Wed, May 6, 2009 at 7:23 AM, Brandon Lamb <brandonlamb at gmail.com> wrote:
>> On Wed, May 6, 2009 at 5:25 AM, Kenneth Kalmer <kenneth.kalmer at gmail.com> 
>> wrote:
>>> On Tue, May 5, 2009 at 11:39 PM, Timo Sirainen <tss at iki.fi> wrote:
>>> 
>>>> On Tue, 2009-05-05 at 23:32 +0200, Kenneth Kalmer wrote:
>>>>>>> * NFS server which is the same server that houses single Courier-IMAP
>>>>>>> installation (Gentoo, 3GB memory)
>>>>>>> * 2x Postfix instances delivering to NFS
>>>>>>> 
>>>>>> 
>>>>>> NFS may be problematic. Dovecot expects a perfectly working NFS setup,
>>>>>> which seems to be a bit rare to find. http://wiki.dovecot.org/NFS
>>>>>> 
>>>>> 
>>>>> Just for the record, dovecot will be access the mail directly on the
>>>> disks,
>>>>> it will be the LDA's on the postfix instances coming in over NFS. I'm
>>>>> reading the NFS again to make sure I understand the risks
>>>> 
>>>> If the LDA is Dovecot deliver, it's the same problem since it also
>>>> updates index/control files that cause the problems. But if you're using
>>>> something else that does nothing but write the maildir files, then it's
>>>> fine.
>>>> 
>>> 
>>> I'm looking to use the Dovecot LDA so the caches are updated and the
>>> filenames are correct, to get good POP3 performance.
>>> 
>>> I'm looking forward to giving Dovecot a go, but I'll rig up a staging
>>> environment first.
>>> 
>>> Thanks for the encouraging responses everyone.
>>> 
>>> Best
>>> 
>>> --
>>> Kenneth Kalmer
>>> kenneth.kalmer at gmail.com
>>> http://opensourcery.co.za
>>> @kennethkalmer
>> 
>> I moved from a 4 gig nfs server with eight mailheads running exim as
>> lda, courier imap/pop3 (over nfs) to an 8 gig nfs server and moved to
>> dovecot imap/pop3 running directly on the nfs server and dropped to
>> four mailheads running exim with dovecot lda.
>> 
>> At first I tried to keep my imap/pop3 services running on the 4
>> mailheads but over nfs had major weird 500 load spikes randomly,
>> moving these to the nfs server solved all of that. The 4 mailheads
>> still deliver to maildir over nfs using dovecot as lda. I have been
>> pleasantly pleased. Our webmail app in our old setup used to take
>> 10-30 seconds to load and now it is instantaneous. Some of it might be
>> from upgrading hardware, but I definitely had a HUGE noticeable
>> difference and you couldnt convince me to go back.
>> 
>> We did have about a week of sucktastic traffic and my support
>> department hating me because all our pop3 leave-messages-on-server
>> users had to redownload all their mail, but it was worth the headache.
>> Dovecot is just too sweet, with its performance and plugins to ever
>> have to even think about a choice between it or software X.
>> 
>> Just my $0.02
> 
> Oh yea, and I just recently discovered the virtual mailbox plugin and
> fell even more in love. I am developing a Gmail clone inhouse for our
> new webmail (we're an ISP). It is cool plugins like this that make me
> glad I switched to Dovecot. Being able to consolidate various Deleted,
> Trash, Deleted Items, Deleted Mails folders all into a single
> virtual/Trash folder is GREAT.

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