邮件格式的规定

设计人：宋普阳
时间： 2004-10-30
摘要：临时设计说明
最后修改日期： 2004-12-5  

参考 Foxmail5.0 的邮件格式

1 邮件头的规定：
Line1: 邮件开端 tag
自行规定

Line2: 日期
Date: Sat, 4 Dec 2004 01:04:17 +0800( 冒号后有空格，以下同 )
提取系统日期时间

Line3: 发信人
From: "azure" <[e-mail]>
对应的变量 : EXmail.mail.From(string)

Line4: 收信人
To: "bsk_azuredragon" <[e-mail]>
对应的变量 : EXmail.mail.To(string)

Line5: 抄送
To: "bsk_azuredragon" <[e-mail]>
对应的变量 : EXmail.mail.Cc(string)

Line6: 暗送
To: "bsk_azuredragon" <[e-mail]>
对应的变量 : EXmail.mail.Bcc(string)

Line7: 主题
Subject: sub
对应的变量 : EXmail.mail.Subject(string)

Line8: 邮件客户端
X-mailer: Mail XP 1.0
字符串常量

Line9: Mime 版本
Mime-Version: 1.0
字符串常量

Line10: 优先级
Priority : Low
对应的变量 : EXmail.mail.Priority(MailPriority)

2 邮件体的规定

首先是内容类型，字符集

Content-Type: text/plain; ( 有分号，详细见下 )
charset="gb2312"( 前面是个 \t)

对应的变量 : EXmail.mail.BodyFormat(MailFormat)

邮件体的详细格式

(1) 如果邮件为单封无格式 Text ，类型为 text/plain ，字符集为 "gb2312" 。后面直接开始内容

Content-Transfer-Encoding: base64( 编码类型 )

（空行）

YnNrX 2F 6dXJlZHJhZ29uo6zE+rrDo6ENCg0KCXNkc2RhZGRhZGFzDQoNCqGhoaGhoaGhoa

GhoaGhoaHWwg0KwPGjoQ0KIAkJCQkNCg0KoaGhoaGhoaGhoaGhoaGhoXNweQ0KoaGhoa

GhoaGhoaGhoaGhoWJza19henVyZWRyYWdvbkBob3RtYWlsLmNvbQ0KoaGhoaGhoaGhoaGh

oaGhoaGhoaEyMDA0LTEyLTA1DQo= （ base64 编码）

(2) 如果邮件为有附件 Text ，类型为 multipart/mixed ，则要起 boundary
boundary="=====001_XXXXXXXXXXXX…X=====" ( 此处仍有 \t ， XXX 部分字数形式和内容自定 )

This is a multi-part message in MIME format. ( 常量 )  

( 以下接正常文本，同上 ) --=====001_XXXXXXXXXXXX…X=====
Content-Type: text/plain;
charset="gb2312"
Content-Transfer-Encoding: base64  

YnNrX 2F 6dXJlZHJhZ29uo6zE+rrDo6ENCg0KCXNkc2RhZGRhZGFzDQoNCqGhoaGhoaGhoa
GhoaGhoaHWwg0KwPGjoQ0KIAkJCQkNCg0KoaGhoaGhoaGhoaGhoaGhoXNweQ0KoaGhoa
GhoaGhoaGhoaGhoWJza19henVyZWRyYWdvbkBob3RtYWlsLmNvbQ0KoaGhoaGhoaGhoaGh
oaGhoaGhoaEyMDA0LTEyLTA1DQo=

( 以下为附件 ) --=====001_XXXXXXXXXXXX…X=====
Content-Type: application/octet-stream; ( 类型为 application/octet-stream)

name="libeay32.dll" ( 文件名 )
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="libeay32.dll"

 

TVqQAAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAA0AAAAA4fug4AtAnNIbgBTM0hVGhpcyBwcm9ncmF
tIGNhbm5vdCBiZSBydW4gaW4gRE9TIG1v ( 附件 )
…

--=====001_XXXXXXXXXXXX…X=====--
(3) 如果为 HTML 格式，类型为 multipart/alternative ，也要起 boundary

boundary="=====003_XXXXXXXXXXXX…X====="

This is a multi-part message in MIME format.  

--=====003_XXXXXXXXXXXX…X=====

( 先是文本信息，同 Text) Content-Type: text/plain;
charset="gb2312"
Content-Transfer-Encoding: base64  

YnNrX 2F 6dXJlZHJhZ29uo6zE+rrDo6ENCg0Kc2RzZGFkZGFkYXMNCg0KoaGhoaGhoaGhoa
GhoaGhodbCDQrA8aOhDQogDQoNCqGhoaGhoaGhoaGhoaGhoaFzcHkNCqGhoaGhoaGhoaG
hoaGhoaFic2tfYXp1cmVkcmFnb25AaG90bWFpbC5jb20NCqGhoaGhoaGhoaGhoaGhoaGhoaG
hMjAwNC0xMi0wNQ0K  

--=====003_XXXXXXXXXXXX…X=====
( 然后再是 HTML) Content-Type: text/html;
charset="gb2312"
Content-Transfer-Encoding: base64  

PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMCBUcmFu
c 2l 0aW9uYWwvL0VOIj4NCjxIVE1MPjxIRUFEPg0KPE1FVEEgaHR0cC1lcXVpdj1Db250ZW
50LVR5cGUgY29udGVudD0idGV4dC9odG1sOyBjaGFyc2V0PWdiMjMxMiI+DQo8TUVUQS
Bjb250ZW50PSJNU0hUTUwgNi4wMC4yODAwLjExMDYiIG5hbWU9R0VORVJBVE9SPjwv
SEVBRD4NCjxCT0RZPjxGT05UIGZhY2U9y 87M 5SBzaXplPTI+DQo8RElWPmJza19henVyZ
WRyYWdvbqOsxPq6w6OhPC9ESVY+DQo8RElWPiZuYnNwOzwvRElWPg0KPERJVj5zZHN
kYWRkYWRhczwvRElWPg0KPERJVj4mbmJzcDs 8L 0RJVj4NCjxESVY+oaGhoaGhoaGhoaGh
oaGhodbCPC9ESVY+DQo8RElWPsDxo6E 8L 0RJVj4NCjxESVY+IDwvRElWPg0KPERJVj4mb
mJzcDs 8L 0RJVj4NCjxESVY+oaGhoaGhoaGhoaGhoaGhoXNweTwvRElWPg0KPERJVj6hoaGh
oaGhoaGhoaGhoaGhYnNrX 2F 6dXJlZHJhZ29uQGhvdG1haWwuY29tPC9ESVY+DQo8RElWP
qGhoaGhoaGhoaGhoaGhoaGhoaGhMjAwNC0xMi0wNTwvRElWPjwvRk9OVD 48L JPRFk+PC
9IVE1MPg0K  

--=====003_XXXXXXXXXXXX…X=====--

(4)HTML 格式带附件的情况
Content-Type: multipart/mixed;
boundary="=====001_XXXXXXXXXXXX…X ====="  

This is a multi-part message in MIME format. 

--=====001_ XXXXXXXXXXXX…X =====
Content-Type: multipart/alternative;

boundary="=====003_ XXXXXXXXXXXX…X ====="  

( 文本内容 )
--=====003_ XXXXXXXXXXXX…X =====

Content-Type: text/plain;
charset="gb2312"
Content-Transfer-Encoding: base64
YnNrX 2F 6dXJlZHJhZ29uo6zE+rrDo6ENCg0Kc2RzZGFkZGFkYXMNCg0KoaGhoaGhoaGhoa
GhoaGhodbCDQrA8aOhDQoNCqGhoaGhoaGhoaGhoaGhoaFzcHkNCqGhoaGhoaGhoaGhoaGh
oaFic2tfYXp1cmVkcmFnb25AaG90bWFpbC5jb20NCqGhoaGhoaGhoaGhoaGhoaGhoaGhMjAw
NC0xMi0wNQ0K  

(HTML 内容 )
--=====003_ XXXXXXXXXXXX…X =====
Content-Type: text/html;
charset="gb2312"
Content-Transfer-Encoding: base64 

PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMCBUcmFu
c 2l 0aW9uYWwvL0VOIj4NCjxIVE1MPjxIRUFEPg0KPE1FVEEgaHR0cC1lcXVpdj1Db250ZW
50LVR5cGUgY29udGVudD0idGV4dC9odG1sOyBjaGFyc2V0PWdiMjMxMiI+DQo8TUVUQS
Bjb250ZW50PSJNU0hUTUwgNi4wMC4yODAwLjExMDYiIG5hbWU9R0VORVJBVE9SPjwv
SEVBRD4NCjxCT0RZPjxGT05UIGZhY2U9y 87M 5SBzaXplPTI+DQo8RElWPmJza19henVyZ
WRyYWdvbqOsxPq6w6OhPC9ESVY+DQo8RElWPiZuYnNwOzwvRElWPg0KPERJVj5zZHN
kYWRkYWRhczwvRElWPg0KPERJVj4mbmJzcDs 8L 0RJVj4NCjxESVY+oaGhoaGhoaGhoaGh
oaGhodbCPC9ESVY+DQo8RElWPsDxo6E 8L 0RJVj4NCjxESVY+PC9ESVY+DQo8RElWPiZu
YnNwOzwvRElWPg0KPERJVj6hoaGhoaGhoaGhoaGhoaGhc3B5PC9ESVY+DQo8RElWPqGh
oaGhoaGhoaGhoaGhoaFic2tfYXp1cmVkcmFnb25AaG90bWFpbC5jb 208L 0RJVj4NCjxESVY+o
aGhoaGhoaGhoaGhoaGhoaGhoaEyMDA0LTEyLTA1PC9ESVY+PC9GT05UPjwvQk9EWT 48L
0hUTUw+DQo=

--=====003_ XXXXXXXXXXXX…X =====--

( 附件 )
--=====001_ XXXXXXXXXXXX…X =====
Content-Type: application/octet-stream;
name="libeay32.dll"
Content-Transfer-Encoding: base64 

TVqQAAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAA0AAAAA4fug4AtAnNIbgBTM0hVGhpcyBwcm9ncmF
tIGNhbm5vdCBiZSBydW4gaW4gRE9TIG1v

…
--=====001_ XXXXXXXXXXXX…X =====--