E-mail & lists client view Anne Villems University of Tartu, Estonia
Everybody has used e-mail! <ul><li>But how many have read documents, which set the standards for e-mail? </li></ul><ul><li...
Mail Standard RFC822 <ul><li>Published in 1982 </li></ul><ul><li>Lines no longer than 1000 char </li></ul><ul><li>Message ...
RFC 822 restrictions <ul><li>no multiple objects in a single message </li></ul><ul><li>no multi-part message bodies </li><...
ASCII times are over! <ul><li>Now we want: </li></ul><ul><li>National language support </li></ul><ul><li>Possibility to se...
MIME - Multipurpose Internet Mail Extension <ul><li>RFC 2045-2048 obsolete RFC 1521, 1522,1590 </li></ul><ul><li>RFC 2045 ...
MIME defines new header lines <ul><li>MIME-Version header field: </li></ul><ul><li>MIME-Version: 1.0 </li></ul><ul><li>The...
“Content type” possible values <ul><li>Text - textual information  </li></ul><ul><li>Image - for transmitting still images...
Content-transfer-Encoding <ul><li>base64 - every 3 bytes are represented  with 4  7-bit ASCII characters </li></ul><ul><li...
Quoted-printable <ul><li>Suitable to present most European languages which are based on ISO 8859-x standard </li></ul><ul>...
Where to get more info about MIME <ul><li>RFC archive with all RFC-s in plain text: </li></ul><ul><li>ftp://ftp.carnet.hr/...
How e-mail works <ul><li>User Agent (UA) - program, with which human users read, create and manage e-mail </li></ul><ul><l...
Working protocols <ul><li>SMTP - primary mechanism for moving mail around TCP/IP network, handles sites with permanent con...
POP, IMAP <ul><li>Aim - to build a distributed e-mail infrastructure </li></ul><ul><li>LAN oriented, vendor specific </li>...
What we want from Mail client? <ul><li>Good user interface </li></ul><ul><li>advanced text editing </li></ul><ul><li>spell...
…more requirements for mail client: <ul><li>signatures (multiple?) </li></ul><ul><li>database </li></ul><ul><li>sophistica...
Mail Clients <ul><li>You can find 28 mail clients in Tucows ultimate software collection for Win95, 13 for Mac and 11 for ...
Most popular clients <ul><li>The Pegasus Mail, no fee, version 2.54 </li></ul><ul><li>http://www.pegasus.usa.com/ </li></u...
Problems going from Eudora to Pegasus <ul><li>Your Adressbooks are not convertible. </li></ul><ul><li>There exists Intergu...
To compare Mail Clients <ul><li>Stroud’s Mail Client Reviews with about 20 packages reviewed: </li></ul><ul><li>http://cws...
Some words about Netiquette <ul><li>Be polite! </li></ul><ul><li>Cite as small part of the letter as possible! </li></ul><...
Questions <ul><li>??? </li></ul><ul><li>??? </li></ul><ul><li>??? </li></ul>
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香港六合彩

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,村民便怂恿壮士去杀了两个怪物,然后又劝说壮士自杀了.(好象是出自庄子还是列子,忘了,有人记得的告诉我一声)对这个寓言的正统解释是——壮士浪子回头,最后以其献身精神为村民作了贡献——下次再有人这样作解释,香港六合彩就一起拔香港六合彩的皮抽香港六合彩的筋再拿窑砖拍烂香港六合彩的不想事儿的南瓜头,因为香港六合彩的解释事实上正好与真正的寓义相反.
两个怪物就是混乱,壮士就是刻意的秩序,秩序有可能消除混乱吗?寓言进行了解释,混乱如果被消灭了,秩序也就不存在了!秩序只会进一步制造混乱.消灭混乱的最好的方法——就是消除刻意的秩序!一个社会要稳定,并不是要人人都去作焦裕禄,而是让人人都有一个平衡的心态!
干嘛硬要香港六合彩献身呢?搞得香港六合彩都跟被捌卖的妇女似的!
另一个寓言:两个无聊的人要给混沌先生凿上面孔,日凿一孔,七日而混沌死——国人们就是那两个极为无聊的人!
精屁!实在是精屁!以上本人的观点真是精屁得不得了!望广为宣扬广为宣扬.
噢,本来这一段是要介绍赵玉的,怎么糊里糊涂地说了这么多精屁的话,发克,看来偶的确不太会写文章,居然跑题儿了!没办法,另起一段再介绍赵玉!
2.反正就是我的焦裕禄岳父大人在赵玉十一岁时就撒手仙逝了.
我再强调一遍,我是十二分尊重我的岳父大人的,但一想到香港六合彩为了所谓公事而丢下孤儿寡母不顾,我就仍是忍不住说了以上那段精屁的话——千万别让赵玉听到了,如果香港六合彩要听到了,我就将再也不能补充钙质了,这会毫无疑问地造成我的营养不良!
赵玉的这种家庭背景造成了香港六合彩早早的自立.从考入大学后,香港六合彩就找到了一份在市文化宫教少儿英语的兼职工作,这就是为什么香港六合彩老喜欢打手手的原因.从此香港六合彩不但不用香港六合彩娘担心香港六合彩在这边的生活,而且

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香港六合彩

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

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