"Cyrus IMAP4" to "Cyrus IMAP" accidental change of greeting?

Bernhard Reiter bernhard at intevation.de
Thu Apr 2 10:58:11 EDT 2009

Am Mittwoch, 1. April 2009 13:46:16 schrieb Ken Murchison:
> I don't recall if this change was intentional or accidental, 

Okay, I just wanted to point it out.

> but I  wouldn't recommend trying to use any free-form banner information to
> determine a server's capability.  In fact, some Cyrus servers might not
> even include "Cyrus" in the banner if folks turn the "serverinfo" option
> off.

I know this is suboptimal, but still some clients might still do it.

> The proper way to detect the presence of shared seen state is the
> following (don't forget that shared seen state is per-mailbox):
> If not present, then no shared seen state.
> Otherwise,
> GETANNOTATION <mboxname> "/vendor/cmu/cyrus-imapd/sharedseen" "value"
> If you get an empty response, then no shared seen state.  Otherwise, the
> value will tell you if its enabled on the given mailbox.

This would answer the wrong question, we want to detect if the server is able 
to run in shared seen state. if it does we can offer a configuration option, 
otherwise we do not. 

I do not know if there is a different test method that could answer this 
question. It is not feasable to try to set the annotation on a  test folder 
for each connection IMO. So best would be if there would be a SHAREDSEEN
or so capability.

> Bernhard Reiter wrote:
> > Just saw that between 2.3.11 and 2.3.12 the greeting changed to not
> > include the "4" of "IMAP4" anymore.
> >
> > https://bugzilla.andrew.cmu.edu/cgi-bin/cvsweb.cgi/src/cyrus/imap/imapd.c
> >.diff?r1=1.545;r2=1.547;f=h The log message indicate no rational of this
> > change, is it indentional?
> >
> > (The second commit fixed a typo that "POP3" was in there, so it does look
> > like a typo indeed.)
> > Ken, both commits are from you. :)
> >
> > I detected this change because we wanted to detect if there is the
> > ability to have shared seen flags in KDE Kontact enterprise and our regex
> > contained "IMAP4", thus we've noticed the change.
> > We'll change the regex, this kind of change should not happen without a
> > reason I guess.
> >
> > (Even better would be to have a capability or so or a better way of
> > detecting the existance of the shared seen flags annotation switch. :) )
> >
> > Best Regards,
> > Bernhard

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