21 The private mailers synchronization operation for plural terminals 1125083 2010 3 1
PC PDA SMTP/POP3 1 POP3 SMTP MUA MUA MUA i
Abstract The private mailers synchronization operation for plural terminals Kenshi Inoue The use of E-mail is important media of research activities and undertaking activities now. In addition, E-mail greatly bears communications in the users life. As a result, the use terminal of E-mail is various with PC, cellular phone, and PDA. Many kinds of the terminal and two or more mail accounts are privately used. The SMTP/POP3 service widespread now doesn t assume two or more terminals use a single account. In the mail reception that uses POP3, a synchronous means is equipped. In Mail Sending that uses SMTP, the synchronous means between terminals is not equipped. In order to let a single account collaborate with plural terminals, it is necessary to work with the same configuration at each terminal. Therefore, the usability deteriorates. It is also important to improve the specification that remains only in the terminal where mail transmitted. In the present study, a synchronous element to use E-mail with two or more terminals was defined. It proposed the synchronizing E-mail architecture of MUA of two or more terminals. And, the proposal architecture was evaluated, and the utility of the proposal architecture was shown. key words E-mail, Environmental synchronization, Synchronization between terminals ii
1 1 1.1................................... 1 1.2................................... 3 1.3................................... 5 2 6 2.1...................................... 6 2.2................................ 6 2.3.......................... 7 2.3.1.................... 7............................... 8............................... 8 MUA............................ 8 2.3.2............................ 9 2.4 MTA............................... 9 2.4.1.......................... 9 2.4.2.......................... 9 2.4.3 DB.............................. 10 2.5 MUA............................... 10 2.5.1....................... 10 2.5.2 MUA........................ 11 3 12 3.1........................ 12 iii
3.2.............................. 13 4 14 15 16 iv
1.1 ( [1])............... 2 1.2 ( [1])................. 2 2.1...................... 8 v
1.1.......................... 5 3.1.......................... 13 vi
1 1.1 (Personal Computer PC ) PC PDA(Personal Digital Assistant) 1.1 1.2 MUA(Mail User Agent) Web Web PC 1
1.1 1.1 ( [1]) 1.2 ( [1]) 2
1.2 PC SMTP/POP3 1 SMTP [2] POP3 MUA PC 1.2 IMAP(Internet Message Access Protocol) Web IMAP MUA MUA 3
1.2 IMAP MUA MUA IMAP LDAP(Lightweight Directory Access Protocol) MUA Web Web MUA Web Web MUA Web PC Web 1.1 4
1.3 1.1 IMAP Web 1.3 MUA MUA 5
2 2.1 2.2 MUA MUA 6
2.3 MUA MUA MUA 2.3 MTA MUA SMTP/POP3 2.1 2.3.1 MTA MUA MUA MTA DB(Database) MUA MTA 7
2.3 2.1 MTA MTA MUA MTA MUA MUA MUA MTA MUA MTA MTA MTA MUA MUA DB 8
2.4 MTA MUA MTA DB MUA 2.3.2 MUA MUA MUA MTA DB 2.4 MTA MTA DB DB MTA 2.4.1 MUA DB SMTP SMTP MUA 2.4.2 MUA MUA DB MUA MUA MUA 9
2.5 MUA 2.4.3 DB DB MUA MUA MTA MUA DB MUA MUA 2.5 MUA MUA MTA MTA MUA 2.5.1 MTA MUA MUA MTA MTA MUA MUA MUA MUA MUA MUA 10
2.5 MUA 2.5.2 MUA MUA MUA MTA SMTP 11
3 3.1 MUA (1) (2) (3) (1) MUA (2) MUA MTA DB MUA MUA MTA DB (3) DB DB 12
3.2 3.2 3.1 3.1 IMAP Web 13
4 MUA MTA MTA MTA MUA MUA MTA MUA MUA 14
24 15
[1] 21 http://www.soumu.go.jp/johotsusintokei/whitepaper/ja/h21/pdf/in [2] RFC 821 Simple Mail Transfer Protocol, August 1982. [3] NTT NTT 2008 Vol.20 No.2 http://www.ntt.co.jp/journal/0802/files/jn200802081.pdf,2010 1 25 16