Re: [Evolution] check file size before transmitting!

[Not Zed <notzed ximian com>]

considering the workaround is so easy, there would be no rush to implement this extension.

On Sat, 2004-05-15 at 16:38 +0200, Tony Earnshaw wrote:
> lør, 15.05.2004 kl. 12.48 skrev Bram Mertens:
>
> > > > Does this mean my ISP's SMTP server is broken/doesn't support this or
> > > > could there be something misconfigured on my side?
> > > 
> > > telnet smtp1.xs4all.be 25
> > [...]
> > > Your ISP's server says you can send 10M e-mails, that would be around 6M
> > > files, once they've been mime encoded in base64.
> > 
> > Thanks for looking into this.  I'm not at all familiar with this but if
> > I understand you correctly my ISP reports the max size to evo which
> > should then immediately refuse to send the message which it didn't. 
> > Should I file a bug report on this?  If so what info should I provide?
>
> Perhaps Jeff or one of the others could say more about what Evo's smtp
> service will do in the future. I'm using Evo 1.4.5. It's not worth
> filing an ITS for Evo 1.4.
>
> I looked at my own mailserver's (Postfix 2.1) log for the file I tried
> for you yesterday - I deliberately set the server to accept 3M SIZE
> files and tried with a 10M mail. Evo saw the SIZE advertised, but took
> no notice. My mail server refused to accept it, but only after Evo had
> started sending it.
>
> rfc1870 says:
>
>    An SMTP client wishing to relay a large content may issue the EHLO
>    command to start an SMTP session, to determine if the server supports
>    any of several service extensions.  If the server responds with code
>    250 to the EHLO command, and the response includes the EHLO keyword
>    value SIZE, then the Message Size Declaration extension is supported.
>  
>    If a numeric parameter follows the SIZE keyword value of the EHLO
>    response, it indicates the size of the largest message that the
>    server is willing to accept.  Any attempt by a client to transfer a
>    message which is larger than this limit will be rejected with a
>    permanent failure (552) reply code.
>
> So ideally Evo should have given a warning and not even have tried to
> send the mail, but very many clients - including other mailservers as
> clients - don't take any notice of the ehlo SIZE keyword.
>
> --Tonni

Michael Zucchi <notzed ximian com> Ximian Evolution and Free Software Developer

Novell, Inc.