qmail的補丁集合

Features of SPAMCONTROL:

1. 郵件轉寄 | Relaying:
   • Relaymailfrom support ("MAIL from:")
2. 統一標準的 Bad* 過濾器 | Unified Bad* Filters:
   • Wildcard HELO/EHLO Greeting filter
   • Wildcard SENDER filter
   • Wildcard RECIPIENT filter
3. MIME 類型過濾 | MIME Type Filter:
   • Signaturs of Base 64 encoded MIME types can be added on-the-fly in a cdb using qmail-newbmt
   • The filter is triggered my means of the environment variabel $BADMIMETYPE
4. DNS MX 記錄檢查 | DNS MX Lookups:
   • DNS Lookup for SMTP SENDER envelope address (MFDNSCHECK)
     Includes option to remove trailing blanks
   • DNS Lookup for hostname in SMTP HELO/EHLO Greeting (HELODNSCHECK)
5. Nasty stuff:
   • SMTP session may be closed in case of a filter condition!
   • BLACKHOLED Sender for the notorious
6. (E)SMTP 擴充 | (E)SMTP Extensions:
   • SMTP SIZE extension [RFC 1870]
   • E(SMTP) Authentication [RFC 2554] 改進了的(E)SMTP 認證!
7. Recipient Whitelising Extension:
   • Accept E-Mails on a (case-insensitive) per-user bases , instead per-domain
   • Multiple User data-bases in cdb format
   • User data-base fastforward compatible or to be constructed on-the-fly via qmail-recipients
8. Controlling:
   • Limitation for the number of "RCPT To:'s" per SMTP session
   • Split Horizon evaluation of badhelo and badmailfrom filters (depending on $RELAYCLIENT)
   • Tarpitting 限制本地認證使用者一次性發送郵件數量的補丁
   • Reverse Split Horizon mechanism:
     Anti-spoofing for "MAIL from:" addresses for $RELAYCLIENTs (in particular if SMTP Authenticated)
     Very useful to identify backdoor/trojan infected hosts!
   • Enforcement for SMTP Authentication for particular senders!
   • Enforcement of brackets for SMTP addresses
9. 反彈郵件控制 | Controlling Bounces:
   • NULLSENDER single RECIPIENT enforcement
   • Limit size of bounces
   • Russel Nelson's double bounce trim
10. Extensible logging (via splogger or multilog ):
    • Accepted and Rejected SMTP sessions
    • Accepted and Rejected SMTP authentication attempts
11. Performance enhancements (experimental):
    • Bruce Guenter's Bigtodo patch
    • Andre Oppermann's Runonce patch
    • Larger input buffer for reading control files
12. 一些常用的補丁 | Recommended patches:
    • MOREIPME patch. 即 0.0.0.0 的patch
    • gcc 3.2 / glibc <errno.h> macro
    • qmail-local tab patch
    • Bruce Guenter's QUEUE_EXTRA patch. 即 QMAILQUEUE patch
    • sendmail patches
    • qmail-smtpd giant Received-Header vulnerability patch