Questions about hardlinks, alternate storage and compression]

Gionatan Danti g.danti at
Mon Nov 30 08:21:51 UTC 2015

Hi all,
I have some updates on the hard-link discussion.

First, let me explain that I installed a test machine with CentOS 7.1 
and dovecot/pigeonhole version 2.2.10-4 and the results where identical 
on what I had on CentOS 6.7 and dovecot 2.0.9-19

The bottom line is that hardlinking works only when no, or at most only 
one, RCPT have sieve filtering. For example:
- if no RCPT has sieve filters, hardlink is OK
- if only one RCPT has sieve filters, hardlink is OK
- if two or more RCPTs have sieve filters, hardlink is NOT working.

Some time ago I reported that, when disabling the sieve_before and 
sieve_after options, hardlinks worked; however, this really was a side 
effect of what written above.

So, let me do a straigth question: is someone using dovecot/LMTP with 
hardlinking? To me, this seems a _very_ important feature, and I wonder 
if I am doing something wrong or if the feature (hardlink+sieve) simply 
does not exists.


On 27/11/2015 09:44, Gionatan Danti wrote:
>> centos 7.x is latest, so if you need help upgrade make a bug report to
>> centos, not waste your time here since you choiced a precompiled
>> problem, reporting here 7s helpfull if you use dovecot compiled with
>> the latest version here, this migth be a unknown bug you then have
>> found, but not if you use precompiled problems, then report to the
>> maintainers of such software
> Hi,
> does it means that when you use before_sieve and after_sieve in your
> dovecot configuration the hard-linking part works?
> I don't need help to upgrade to CentOS 7.x, but before going this route
> I would understand if this is how dovecot/pigenhole are expected to work
> (don't use hardlinks) or if I misconfigured something.
> RedHat / CentOS are a very common base OS, so I wonder if I am the only
> one hitting this problem or no.
> Thanks.

Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. -
email: g.danti at - info at
GPG public key ID: FF5F32A8

More information about the dovecot mailing list