Re: [EAI] AD review of draft-ietf-eai-pop-06

[Alexey Melnikov <[e-mail]>]

Randall Gellens wrote:

> At 2:32 PM +0100 7/22/09, Alexey Melnikov wrote:
>
>>  If we want to keep the SHOULD, your last point ("Because clients 
>> have to be changed to ask for this anyway") needs to be explicitly 
>> spelled out. I am not sure how existing clients are using results of 
>> the LIST command. I also think that in this case the document needs 
>> to say that messages sizes MUST be consistent (i.e. for a given 
>> message the server must return the same size in LIST all the time).
>
> More text making it clear that sizes in POP should be advisory could 
> be helpful.

Right.

> I'm not sure why the size needs to be consistent, though.  For 
> example, if a server uses a guestimate initially, but then does a 
> conversion and learns the exact size, why shouldn't it start returning 
> the exact size?

Ok, this is a convincing argument.

My concern was about clients caching message sizes between sessions, 
maybe to help identify messages uniquely. But that might not be a real 
problem.