# Note that Outlook 2003 seems to have problems with %v.%u format which was
  # Dovecot's default, so if you're building a new server it would be a good
  # idea to change this. %08Xu%08Xv should be pretty fail-safe.

Where i can change this

2006/11/20, Alex <abusquets@gmail.com>:
pop3_uidl_format = %v

2006/11/20, Knute Johnson <knute@frazmtn.com>:
>i'm working with dovecot-1.0.rc15
>
>I have receive a lot of duplicate emails with microsoft outlook, i don't
>have this problem with outlook express
>This is in pop3
>

I have seen this occaisionally too.  I cannot make it happen.  I'm
running version dovecot-1.0-0.beta8.2.fc5 on my FC5 box.  The client
is Pegasus Mail 4.41 running on Windows XP.  I have Popfile and Avast
in between and I am retrieving the mail from the POP3S.

--
Knute Johnson
Molon Labe...