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六合彩|香港六合彩 » SlideShare

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帮,此次前来是为了讨债。” ...

帮,此次前来是为了讨债。”

“哦?”金眼一扬细长的眉毛,笑道:“讨债?什么债?”玄子

丹冷声道:“血债!”“哈哈!”金眼狂笑,道:“香港六合彩

欠下的血债多不胜数,也不在乎多你一个,不过你得先告诉我,

究竟怎么回事?”“天意酒吧的事件不用我细说了吧,是谁做的

谁心里明白。”玄子丹一字一句,铿锵有力说道。金眼微微扬头

,一眯眼睛,道:“没错!这笔帐我认下了,但你好象还有话说

?”

玄子丹咬牙道:“香港六合彩大哥儿子的一只手臂。”

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    六合彩|香港六合彩 » SlideShare 六合彩|香港六合彩 » SlideShare Presentation Transcript

    • E-mail & lists client view Anne Villems University of Tartu, Estonia
    • Everybody has used e-mail!
      • But how many have read documents, which set the standards for e-mail?
      • These standards have been set up in the documents:
      • RFC 822 / RFC 821
      • MIME standards set in
      • RFC 2045/2046/2047/2048
      • (old verson RFC 1521/1522)
    • Mail Standard RFC822
      • Published in 1982
      • Lines no longer than 1000 char
      • Message body - plain US-ASCII text
      • Message header lines - plain US-ASCII text
      • Limit on message length
    • RFC 822 restrictions
      • no multiple objects in a single message
      • no multi-part message bodies
      • no non-textual bodies
      • no X.400 messages can be gatewayd
      • no multifont messages
    • ASCII times are over!
      • Now we want:
      • National language support
      • Possibility to send
        • pictures
        • audiofiles
        • other applications
        • video files
        • multimedia applications
    • MIME - Multipurpose Internet Mail Extension
      • RFC 2045-2048 obsolete RFC 1521, 1522,1590
      • RFC 2045 Format of Internet Message Bodies
      • RFC 2046 Media Types
      • RFC 2047 Message Header Extension for Non-ASCII Text
      • RFC 2048 Registration Procedures
      • To solve RFC822 restrictions without serious incompatibilities with it
    • MIME defines new header lines
      • MIME-Version header field:
      • MIME-Version: 1.0
      • The content type header field to specify the the type and subtype of data in the body:
      • Content-Type: Text/Plain: Charset=ISO-8859-1
      • Content-Transfer-Encoding field to show how data is encoded
      • Content-Transfer-Encoding: QUOTED-PRINTABLE
      • Content-ID and Content-Description for future use
    • “Content type” possible values
      • Text - textual information
      • Image - for transmitting still images (gif,jpeg)
      • Audio - requires audio output device
      • Video - to display moving images, like mpeg
      • Application - information to be processed by application program
      • Multipart - to represent compound, possibly embedded parts
      • Message - an encapsulated message
    • Content-transfer-Encoding
      • base64 - every 3 bytes are represented with 4 7-bit ASCII characters
      • quoted-printable - will code only non-ASCII characters in the text, 76char lines
      • 7bit - no coding, already 7bit
      • 8bit - have to be transported as 8-bit
      • binary - as 8bit, but may contain long lines
    • Quoted-printable
      • Suitable to present most European languages which are based on ISO 8859-x standard
      • Non-ASCII chars will be coded with 3 chars: ´=´ followed by code in base (16) Examples:
      • Ü =DC ä =E4 ö =F6
    • Where to get more info about MIME
      • RFC archive with all RFC-s in plain text:
      • ftp://ftp.carnet.hr/pub/Internet/rfc/
      • Mark Grand’s “MIME Overview”
      • http://www.mindspring.com/~mgrand/mime.html
      • comp.mail.mime FAQ
      • http://www.cis.ohio-state.edu/text/faq/ usent/mail/mime-faq/
    • How e-mail works
      • User Agent (UA) - program, with which human users read, create and manage e-mail
      • Mail Transport Agent (MTA) - handling the movement of messages among computers, non-real-time manner; SMTP - Simple Mail Transfer Protocol - must be installed at every Internet Host
    • Working protocols
      • SMTP - primary mechanism for moving mail around TCP/IP network, handles sites with permanent connections
      • SMTP delivers mail, not allows user to collect it - sometimes the latter is more convenient
      • POP, IMAP - fill the gap, they are oriented to serve users when they want
    • POP, IMAP
      • Aim - to build a distributed e-mail infrastructure
      • LAN oriented, vendor specific
      • POP - Post Office Protocol, latest version POP3, RFC 1725 (1460)
      • IMAP - the Internet Message Access Protocol, latest version IMAP4, RFC2060 (1731)
    • What we want from Mail client?
      • Good user interface
      • advanced text editing
      • spelling checker
      • attachments allowed
      • addressbook (with groups!)
      • MIME
      • uudencode/decode
      • Encryption!
      • + mailing lists
      • pager support
      • multiple accounts
      • multilingual support
      • full text indexing + search
      • message filtering
      • … and more
    • …more requirements for mail client:
      • signatures (multiple?)
      • database
      • sophisticated send:
      • send e-mail to all my students who live in Liberty street
      • download headers and delete mail from server based on header info
      • UseNet Newsgroups
      • Live spelling
      • Thesaurus
      • auto-dialing
      • Free Internet Fax
      • Confirmation ability
    • Mail Clients
      • You can find 28 mail clients in Tucows ultimate software collection for Win95, 13 for Mac and 11 for win 3.x
      • They need from 65K to 4.5M memory
      • Tocows has mirrors in many countries
      • one in Croatia:
      • http://www.hrt.hr/tucows/
    • Most popular clients
      • The Pegasus Mail, no fee, version 2.54
      • http://www.pegasus.usa.com/
      • FAQ http://www.let.nl/pegasus/faq.html
      • Eudora (Qualcomm Inc.)
        • Eudora Pro 3.0.3
        • Eudora Light 3.0.3
      • http://www.qualcomm.com/
    • Problems going from Eudora to Pegasus
      • Your Adressbooks are not convertible.
      • There exists Interguru Web-site to help you to convert Eudora nickname file to Pegasus address file:
      • http://www.interguru.com/eudopega.htm
    • To compare Mail Clients
      • Stroud’s Mail Client Reviews with about 20 packages reviewed:
      • http://cws.internet.com/32mail-reviews.html
      • Intervue Internet Client reviews:
      • http://www.eqp.com/egrinter.html
      • Tucows has evaluated all packages with 0.5 - 5 cows.
    • Some words about Netiquette
      • Be polite!
      • Cite as small part of the letter as possible!
      • DO NOT USE UPPER CASE LETTERS THROUGHOUT THE LETTER
      • Use “smilies”: :-) :-( ;-)
      • Take differencies in the culture into account.
    • Questions
      • ???
      • ???
      • ???