IMAP4 extensions for Visual Voicemail (VVM)

Stephan Bosch stephan at
Fri Nov 15 17:23:55 EET 2019

Op 15-11-2019 om 16:15 schreef Harald Leithner via dovecot:
> If you use an Iphone (and your mobile proivder supports it) then you are
> using it ;-)
> just my 2 cents

Android apparently supports it as well.



> Am 21.10.2019 um 12:26 schrieb Stephan Bosch via dovecot:
>> Op 20-10-2019 om 22:33 schreef Jean-Daniel via dovecot:
>>>> Le 20 oct. 2019 à 22:24, Mauricio Tavares via dovecot
>>>> <dovecot at <mailto:dovecot at>> a écrit :
>>>> On Sun, Oct 20, 2019 at 10:43 AM Rajesh Bansal via dovecot
>>>> <dovecot at <mailto:dovecot at>> wrote:
>>>>> Hi Team,
>>>>> I need to develop Visual VoiceMail solution. In this solution I need
>>>>> a IMAP4 server, from which I can get a hit for each mail retrieval.
>>>>> Can anyone help me if dovecot can be used for this purpose.
>>>>       That is rather vague. Do you want to do something like ol' biff
>>>> or what we used to do with Asterix 10 years ago (get an email with the
>>>> voicemail as as attachment)?
>>> I guess he is talking about that:
>> I skimmed through this. It adds quite a few strange custom bits to the
>> IMAP protocol. Part of this are a few new commands and METADATA items,
>> which should be quite easy to implement. However, the amendments also
>> include various attachment-based QUOTA limits. Dovecot doesn't support
>> this and adding that is not trivial.
>> Also, this specification is quite old and outdated (it even mentions an
>> MD5 authentication mechanism). Is this even actively used anywhere?
>> Regards,
>> Stephan.

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