Ari Erev Vladimir Shveidel November 21, 2002

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Presentation transcript:

Ari Erev Vladimir Shveidel November 21, 2002 SMTP Service Extension for message Media Size declaration (draft-shveidel-mediasize-01.txt) IETF-55 Update Ari Erev Vladimir Shveidel November 21, 2002

ESMTP – MediaSize extension In a Multimedia / Multi-Context message store a “Quota per media” is maintained. Implements a requirement from um-issues internet draft (draft-vaudreuil-um-issues-00.txt) Same in concept as RFC 1427 (“SMTP Service Extension for Message Size Declaration”) but extends it to “multi-media”. Builds on “message-context” internet-draft (draft-ietf-vpim-hint-08.txt) This will be the base for discussion

MediaSize Overview “…Allows an SMTP client and an SMTP server to coordinate transmission of a message based on its size, classified by specific media type(s). This allows the server to manage quota per media or per message-context (see [6])…” This will be the base for discussion

MediaSize – Main updates in 01.txt Format syntax corrected. Clarified Server and Client actions in error conditions. Added requirement for supporting at least 32 bit unsigned integer size-value representation This will be the base for discussion

MediaSize: Open Issues – for discussion 1. What are the available MediaTypes? Message-Context, Content-Type, IMAP Quota? A new, specific one 2. MediaSize vs. “General Resource” Abstrace resources examples: MediaSize Resource=No of Fax Pages. Measurment Unit = pages. Number of Attachments Number of attachements for a specific media-type (e.g.Number of Voice Attachments This will be the base for discussion

For Further Information… UM-LEMONADE mailing list send ‘subscribe um' to: Majordomo@mail.snowshore.com Contact us Ari.Erev@comverse.com Vladimir.Shveidel@comverse.com

Additional / Spare slides

ESMTP – MediaSize extension EHLO-based capability: 250-MEDIASIZE media1:size1;size media2:size3 … Client adds (optional) media:size as a parameter to MAIL command. Server may reject message based on “global size” or “media size” quota basis. This will be the base for discussion

MediaSize example Example: C: EHLO merlot.mailsrv.com S: 250- merlot.mailsrv.com … S: 250 SIZE 1000000 S: 250 MEDIASIZE video:100sec;10000kb / fax:20pages;2000kb voice:10sec C: MAIL FROM:user@mail.com / SIZE=80000; video:7sec; fax:3pages S: 250 Address Ok. C: RCPT TO: <recv1@mailsrv.com S: 250 recv1@mailsrv.com OK; can accept / 80000;video:7sec;fax:3pages C: RCPT TO: recv2@mailsrv.com S: 452 insufficient system media storage / (fax): recv2@mailsrv.com Server This will be the base for discussion

MediaSize – Feedback Received Dan Wing (Cisco): Use only “message-context size”. Need to externalize/define/clarify the Transformation among unit-sizes (or “use only size in bytes”). Dan Kohn [dan@dankohn.com] Use ‘kibibytes’ (not kilobytes). This will be the base for discussion