23 1.1 1.2 1.2.1 1.2.2 24 26 26 26 29 31 33 34 1.3 36 1.3.1 1.3.2 1.3.3 1.3.4 EXPN/VRFY 36 VRFY EXPN 36 37 38 38 45 46 46 DoS 51 Flood DoS 51 7
51 52 DDoS 53 1.4 58 1.4.1 1.4.2 1.4.3 1.4.4 1.4.5 1.4.6 58 60 62 63 63 66 67 68 68 69 70 70 72 Aliz 72 Code Red 73 Nimda 76 Badtrans 81 GONER 82 (6) Klez 83 (7) Backdoor.Helios 84 (8) 85 1.5 Web 87 87 90 1.6 91 1.7 94 95 8
97 1.8 99 1.8.1 1.8.2 1.8.3 99 99 100 101 spam 101 101 103 1.9 107 1.9.1 1.9.2 1.9.3 107 107 108 111 112 112 113 113 Man-in-the-middle 113 1.10 1.10.1 (6) ( 115 115 ) 115 115 116 116 (Web spoofing) 116 116 1.10.2 116 9
119 2.1 119 2.2 120 2.3 121 2.3.1 2.3.2 2.3.3 2.3.4 2.3.5 2.3.6 121 IDS 121 121 123 124 125 127 IDS 129 IDS 130 IDS 131 IDS 132 IDS 134 135 135 IDS 138 139 143 3.1 SMTP 143 3.1.1 143 MTA(Mail Transfer Agent) 143 MDA(Mail Delivery Agent) 144 MUA(Mail User Agent) 144 3.1.2 3.1.3 SMTP 144 146 10
3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 SMTP 147 SMTP 149 SMTP 151 SMTP 153 154 154 154 154 SMTP 155 155 SMTP MTA 155 3.2 sendmail 156 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 (6) (7) 3.2.6 sendmail 156 sendmail Sendmail 157 UNIX sendmail Sendmail Advanced Message Server 157 Sendmail Advanced Message Server 158 Sendmail Advanced Message Server 158 sendmail 159 sendmail 160 160 161 161 senmdail 162 sendmail 163 163 163 169 smmsp smmsp 169 sendmail 169 sendmail 170 sendmail 171 11
3.2.7 183 183 smtpd 187 3.3 qmail 192 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 3.3.7 qmail 192 qmail 195 qmail 198 qmail 198 199 199 201 qmail 201 qmail 202 204 205 tcpserver 207 tcpserver 207 208 208 208 tcpserver 209 qmail 212 3.4 Postfix 217 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 Postfix 217 sendmail 219 Postfix 219 Postfix Postfix 220 221 Postfix 223 Postfix 224 Postfix 226 12
3.4.6 (6) 3.4.7 Postfix 227 Postfix 227 make 228 Postfix 228 228 sendmail 229 229 231 main.cf 232 master.cf 235 aliases 235 transport 236 access 236 (6) 3.4.8 3.4.9 236 sendmail Postfix 238 241 3.5 Microsoft Exchange Server 242 3.5.1 Exchage 2000 Server 243 243 Windows 2000 244 245 Web Strage System 246 3.5.2 3.5.3 Exchange Server 246 248 248 Outlook Web Access 255 Exchange Server 261 Exchange 2000 261 Exchange 2000 262 3.6 MTA 263 3.6.1 ZMailer 263 13
3.6.2 Exim 263 3.6.3 SMTPfeed 265 3.7 SMTP 265 3.7.1 STARTTLS 265 STARTTLS 265 STARTTLS 267 sendmail STARTTLS 267 3.7.2 SMTP Authentication 275 SMTP Authentication 275 SMTP-AUTH 275 SMTP-AUTH 277 qmail SMTP-AUTH 279 3.7.3 POP before SMTP 289 POP before SMTP 289 POP before SMTP 289 POP before SMTP 290 299 4.1 POP 299 4.1.1 4.1.2 4.1.3 4.1.4 4.1.5 POP 299 MUA(Mail User Agent) 302 POP 303 POP 304 POP3 304 4.2 qpopper 309 4.2.1 4.2.2 4.2.3 4.2.4 4.2.5 qpopper 309 qpopper 310 qpopper 310 qpopper 310 qpopper 312 14
4.2.6 qpopper APOP 314 319 5.1 IMAP 319 5.1.1 IMAP 319 5.1.2 5.1.3 5.1.4 5.1.5 (6) (7) (8) 5.1.6 5.1.7 5.1.8 5.1.9 IMAP 320 IMAP POP 322 322 323 323 IMAP 323 IMAP4rev1 324 324 325 326 326 327 327 327 328 IMAP 329 IMAP4rev1 331 331 331 332 IMAP4rev1 332 IMAP4rev1 333 334 335 338 15
342 5.2 UW-IMAP 344 5.2.1 UW-IMAP 344 5.2.2 5.2.3 5.2.4 5.2.5 (6) (7) 5.2.6 5.2.7 UW-IMAP 344 UW-IMAP 344 IMAP 344 345 345 345 UW-IMAP 346 UW-IMAP 347 UW-IMAP 347 348 348 UW-IMAP 349 349 /etc/c-client.cf 351 353 UW-IMAP 354 UW-IMAP 354 cram-md5.pwd 354 355 UW-IMAP 356 root 356 /etc/passwd 356 5.3 Cyrus-IMAP 357 5.3.1 Cyrus-IMAP 357 5.3.2 5.3.3 Cyrus-IMAP 357 Cyrus-IMAP 358 358 IETF 358 16
5.3.4 5.3.5 5.3.6 358 358 359 Cyrus-IMAP 359 Cyrus-IMAP 360 Cyrus-IMAP 361 Berkeley DB 362 Cyrus-SASL 362 Cyrus-IMAP 364 Cyrus-IMAP 364 364 /etc/imapd.conf 365 367 369 370 5.4 Courier-IMAP 373 5.4.1 Courier-IMAP 373 5.4.2 5.4.3 5.4.4 5.4.5 5.4.6 Courier-IMAP 373 Courier-IMAP 373 Courier-IMAP 374 Courier-IMAP 375 Courier-IMAP 375 375 Courier-IMAP 376 Courier-IMAP 378 378 CRAM-MD5 379 17
381 6.1 6.1.1 6.1.2 382 MUA 383 MUA 6.2 6.2.1 6.2.2 6.2.3 6.2.4 6.2.5 384 384 SMTP 384 POP 385 APOP 385 IMAP4 385 PGP 386 6.3 6.3.1 6.3.2 6.3.3 387 mbox 387 MH 388 Maildir 389 6.4 389 6.4.1 6.4.2 6.4.3 389 390 392 6.4.4 MIME 393 6.4.5 395 395 6.5 6.5.1 6.5.2 396 397 398 APOP 398 APOP 398 APOP 398 APOP 400 PGP S/MIME 400 400 18
6.5.3 6.5.4 402 403 405 OpenPGP S/MIME 405 OpenPGP 409 OpenPGP 409 OpenPGP 410 414 S/MIME 415 S/MIME 415 S/MIME 415 6.6 419 6.6.1 Outlook Express 419 Outlook Express 419 Outlook Express 419 Outlook Express 421 6.6.2 Becky! Internet E-mail 426 Becky! 426 Becky! 428 429 7.1 429 7.1.1 7.1.2 7.1.3 429 431 432 432 432 433 7.2 433 434 19
7.2.1 7.2.2 (6) (7) 7.2.3 435 435 436 436 436 437 438 439 441 442 443 448 450 450 451 ( ) 452 453 7.3 7.3.1 7.3.2 453 454 454 455 455 456 457 463 20