E-mail \u96fb\u5b50\u90f5\u4ef6
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\u5167\u5b9a\u4f7f\u75287bit-ascii\u5132\u5b58
\u6b77\u53f2
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\u767c\u9001\u4fe1\u67b6\u69cb\u5982\u4e0b
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DA(Deliver Agent):\u5c07\u5f9e\u7db2\u8def\u6536\u4f86\u7684\u4fe1,\u4e5f\u5c31\u662fTA\u7d66\u7684\u4fe1\u653e\u5230\u7cfb\u7d71\u4fe1\u7bb1
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……………………………….
RFC822\u8868\u982d\u683c\u5f0f:
TO:\u4e3b\u8981\u6536\u4fe1\u4ebadns\u4f4d\u5740
Cc:\u9644\u5e36\u6536\u4fe1\u4eba
Bcc:\u79d8\u5bc6\u526f\u672c
From:\u7522\u751f\u4fe1\u4ef6\u7684\u4eba
Sender:\u5bc4\u4ef6\u7684\u4eba,\u53ef\u7701
Received:\u542b\u7a0b\u5f0f\u4ee3\u865f,\u6536\u5230\u8a0a\u606f\u6642\u9593,\u627e\u51fa\u8def\u5f91\u9078\u64c7\u7cfb\u7d71\u7684\u8cc7\u8a0a,\u8def\u5f91\u4e0a\u5404\u50b3\u9001\u4ee3\u7406\u7a0b\u5f0f\u6703\u52a0\u4e00\u884c
\u683c\u5f0f\u5927\u81f4\u70bafrom by
ex:from attack.systw.net([10.10.10.1]) by victim.net with smtp
\u8868\u793a\u4fe1\u662f\u5f9eattack.systw.net\u9019\u500b\u4e3b\u6a5f\u5bc4\u51fa,\u800c\u7531victim.net\u9019\u500b\u4e3b\u6a5f\u6536\u5230
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RFC822\u8868\u982d\u683c\u5f0f\u90e8\u5206\u6b04\u4f4d:\u53ef\u8a2d\u79c1\u4eba\u7528\u8868\u982d,\u6b04\u4f4d\u540d\u9700\u4ee5X-\u958b\u982d
Date:\u5bc4\u51fa\u6642\u9593
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Message-Id;\u552f\u4e00\u4ee3\u865f
In-Reply-To:\u56de\u4fe1\u539f\u59cb\u4ee3\u865f
References:\u76f8\u95dc\u4fe1\u4ef6\u4ee3\u865f
Keywords:\u4f7f\u7528\u8005\u9078\u64c7\u95dc\u9375\u5b57
Subject:\u4e3b\u65e8
ps:\u66f4\u591a\u8cc7\u8a0a\u53ef\u53c3\u8003
http:\/\/www.ascc.sinica.edu.tw\/nl\/89\/1603\/3.txt
http:\/\/www.wretch.cc\/blog\/kkvivi6309\/11962081
MIME(multipurpose internet mail extensions,\u591a\u7528\u9014\u7db2\u969b\u7db2\u8def\u90f5\u4ef6\u5ef6\u4f38)RFC1314
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MIME\u589e\u52a0\u7684RFC822\u6b04\u4f4d
MIME-Version:\u7248\u672c
Content-Description:ascii\u5b57\u4e32,\u8868\u8a0a\u606f\u5167\u5bb9
Content-Id:\u5167\u5bb9\u8b58\u5225\u4ee3\u865f
Content-transfer-Encoding:\u4e3b\u4f53\u5305\u88dd\u7de8\u78bc\u65b9\u5f0f(7bit-ascii,8bit-ascii,binary,base64,quoted-printable,x-token)
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text\/html:\u7db2\u9801
text\/xml:\u7db2\u9801
image\/gif:\u5716\u7247
image\/jpeg:\u5716\u7247
audio\/basic:\u8072\u97f3
video\/mpeg:\u53ea\u542b\u8996\u89ba\u8cc7\u8a0a,\u4e0d\u80cc\u666f\u97f3\u6548,mpeg(moving picture experts group,\u52d5\u614b\u5f71\u50cf\u58d3\u7e2e\u6a19\u6e96)
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application\/postscript\uff1a\u7528\u65bc\u63cf\u8ff0\u5217\u5370\u7684\u5167\u5bb9
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multipart\/alternative\uff1a\u5404\u90e8\u4efd\u76f8\u540c,\u4f46\u7528\u4e0d\u540c\u5a92\u9ad4\u6216\u7de8\u78bc
multipart\/parallel\uff1a\u53ef\u7528\u5728\u591a\u7a2e\u8a9e\u8a00
multipart\/digest\uff1a\u8a31\u591a\u8a0a\u606f\u5305\u88dd\u6210\u7d44\u5408\u8a0a\u606f\u6642
……………………………….
SMTP(simple mail transfer protocol,\u7c21\u6613\u90f5\u4ef6\u50b3\u8f38\u5354\u5b9a)
port:25,\u7c21\u55aeascii\u5354\u5b9a,\u4f7f\u7528HELO\u6307\u4ee4
\u82e5\u7528\u6236\u7aef\u548c\u4f3a\u670d\u7aef\u903e\u6642\u9593\u5404\u4e0d\u540c,\u53ef\u80fd\u5728\u5176\u4e2d\u4e00\u7aef\u4ecd\u5fd9\u9304\u6642\u4e2d\u65b7
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ESMTP(extended SMTP)\u64f4\u5145\u7684SMTP\uff1a\u53ef\u89e3\u6c7a\u90e8\u4efd\u554f\u984c,\u4f7f\u7528EHLO\u6307\u4ee4
POP3(post office protocol version3,\u90f5\u5c40\u901a\u8a0a\u5354\u5b9av3)
port:110,\u5b9a\u7fa9\u5728rfc1939
1\u7528\u5728\u4f7f\u7528\u8005\u8b80\u53d6\u90f5\u4ef6\u6642,\u9023\u5230pop3\u4f3a\u670d\u5668\u7528110port\u5efatcp\u9023\u7d50,\u6210\u529f\u5f8c\u4f3a\u670d\u7aef\u50b3ascii\u683c\u5f0f\u7684+OK
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4\u66f4\u65b0\u5e33\u865f\u5167\u90f5\u4ef6\u5247\u57f7\u884c\u522a\u9664,\u53ef\u7528DELE
5\u7528QUIT\u7d42\u6b62\u8655\u7406\u968e\u6bb5,\u7136\u5f8c\u5207\u65b7TCP\u9023\u7d50
IMAP(internet message access protocol,\u7db2\u969b\u7db2\u8def\u8a0a\u606f\u5b58\u53d6\u5354\u5b9a)
port143,\u5b9a\u7fa9\u5728rfc2060
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\u76ee\u524d\u7684\u7248\u672c\u70baIMAP4<\/p>\n\n\n\n
……………<\/p>\n\n\n\n
\u4ee5telnet\u6aa2\u67e5smtp\u65b9\u5f0f<\/strong><\/p>\n\n\n\n telnet mailserver.com 25 E-mail \u96fb\u5b50\u90f5\u4ef6\u4fe1\u5c01:\u8868\u982dheader+\u4fe1\u4f53\u672c\u9ad4bod …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[29],"tags":[],"class_list":["post-857","post","type-post","status-publish","format-standard","hentry","category-osi-layer7"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=857"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/857\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
HELO self.com \/\/\u5148\u6307\u5b9aSMTP\u4e3b\u6a5f\u4e4b\u9593\u901a\u8a0a\u7684\u958b\u982d\u554f\u5019\u8a9e\uff0c\u5f8c\u9762\u8981\u5e36\u81ea\u5df1\u7684\u5bc4\u4fe1\u7db2\u57df\u540d\u7a31
mail from:test@self.com \/\/\u5ba3\u544a\u5bc4\u4ef6\u8005\u7684\u5bc4\u4fe1\u7db2\u57df\u540d\u7a31
rcpt to:test@mailserver.com \/\/\u6307\u5b9a\u8981\u9001\u5230\u5c0d\u65b9\u4e3b\u6a5f\u7684\u90a3\u500b\u5e33\u865f
data \/\/\u6307\u793a\u5c0d\u4e3b\u6a5f\u6e96\u5099\u8981\u8f38\u5165\u8a0a\u606f
Subject:mailtest \/\/\u8f38\u5165\u4e3b\u65e8\u70bamailtest
this is mail test \/\/\u958b\u59cb\u8f38\u5165\u5167\u5bb9
. \/\/\u8f38\u5165\u5b8c\u7562\u4e4b\u5f8c\u4ee5\u55ae\u7368\u7684 . \u4f5c\u7d50\u675f<\/p>\n","protected":false},"excerpt":{"rendered":"