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SMTP Service Extension for message Media Size declaration (draft-shveidel-mediasize-01.txt)

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.

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SMTP Service Extension for message Media Size declaration (draft-shveidel-mediasize-01.txt)

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

  2. 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)

  3. 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])…”

  4. 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

  5. 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

  6. 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

  7. Additional / Spare slides

  8. 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.

  9. 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.comS: 250 recv1@mailsrv.com OK; can accept / 80000;video:7sec;fax:3pages C: RCPT TO: recv2@mailsrv.comS: 452 insufficient system media storage / (fax): recv2@mailsrv.com Server

  10. 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).

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