意思說請啟用 pop3s/imaps 的通訊協定
POP3S要加密連線 Port=995
IMAPS Port=993
SMTPS要加密連線 Port=465
所以在 iptables 規則要打開
-A INPUT -d 59.125.46.239/32 -i eth1 -p tcp -m multiport --dports 25,80,53,109,110,143,220,465,993,995 -j ACCEPT
加密測試
when testing SSL/TLS connections they all works i.e.
# for pop:
openssl s_client -connect localhost:995
# for imap:
openssl s_client -connect localhost:993
openssl s_client -connect localhost:143 -starttls imap
查看 dovecot 設定參數
dovecot -n
驗證 IMAP 登入
telnet localhost 143
Trying ::1...
Connected to localhost.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE STARTTLS AUTH=PLAIN] Dovecot ready.
a login 帳號 密碼
a OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS] Logged in
a logout
* BYE Logging out
a OK Logout completed.
Connection closed by foreign host.
驗證 pop3 登入
telnet localhost 110
Trying ::1...
Connected to localhost.
Escape character is '^]'.
+OK Dovecot ready. <7a5.1.4eb3849d.2IRIYALYD32GHo8hJ7CPJw==@ms2.xxxxxx.com.tw>
user jou
+OK
pass my_passwd
+OK Logged in.
quit
+OK Logging out.
Connection closed by foreign host.
