OPS335 Dovecot

Configuration for IMAP and POP3

• Edit the configuration file /etc/dovecot/dovecot.conf, and add the following line to the bottom of the file, or uncomment the same line in /etc/dovecot/conf.d/10-mail.conf:

mail_location = mbox:~/mail:INBOX=/var/mail/%u

• Change the access permission of user mail box in /var/mail from 660 to 600 with the following command:

chmod 600 /var/mail/*

Testing POP3 port 110

• Login to your POP3 server as a regular user.
• telnet 192.168.122.184 110

The following is a typical successful POP3 session:

Testing POP3 port 995

• openssl s_client -connect 192.168.122.184:995

The following is a sample POP3S session:

[root@rchan ~]# openssl s_client -connect 192.168.122.184:995
CONNECTED(00000003)
depth=0 OU = IMAP server, CN = imap.example.com, emailAddress =  postmaster@example.com
verify error:num=18:self signed certificate
verify return:1
depth=0 OU = IMAP server, CN = imap.example.com, emailAddress =  postmaster@example.com
verify return:1
---
Certificate chain
 0 s:/OU=IMAP server/CN=imap.example.com/emailAddress=postmaster@example.com
  i:/OU=IMAP server/CN=imap.example.com /emailAddress=postmaster@example.com
---
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=/OU=IMAP server/CN=imap.example.com /emailAddress=postmaster@example.com
issuer=/OU=IMAP server/CN=imap.example.com /emailAddress=postmaster@example.com
---
No client certificate CA names sent
---
SSL handshake has read 1301 bytes and written 311 bytes
---
New, TLSv1/SSLv3, Cipher is DHE-RSA-AES256-SHA
Server public key is 1024 bit
Secure Renegotiation IS supported
Compression: zlib compression
Expansion: zlib compression
SSL-Session:
   Protocol  : TLSv1
   Cipher    : DHE-RSA-AES256-SHA
   Session-ID: 7D2FAD3059BB443857C4FC5766F55E2AF58DC0612E884A12918C84F409C63C85
   Session-ID-ctx:
   Master-Key: 897A5BB65CA9542E502FAFCDEF3918C13BC6C42721BD60443311D1FDD7DA691C0DDA17FB284ADA74083D1ADB2A2B4265
   Key-Arg   : None
   Krb5 Principal: None
   PSK identity: None
   PSK identity hint: None
   TLS session ticket:
   0000 - 06 ef d1 c5 22 bb 33 30-8f 6a de 1e 5f 7b 03 55   ....".30.j.._{.U
   0010 - 30 d3 3b 67 21 ed 34 1a-dd 50 43 25 fe 45 16 b7   0.;g!.4..PC%.E..
   0020 - 5b d3 0f 9b f8 59 04 b6-3a 6c 2c 8b 13 4f c8 54   [....Y..:l,..O.T
   0030 - 77 fa e1 3f 47 f9 fc 3a-72 f8 4e 21 e1 e9 b3 3d   w..?G..:r.N!...=
   0040 - 08 be d5 83 50 91 48 d7-03 09 f7 2b ae a7 81 9c   ....P.H....+....
   0050 - 23 53 48 a2 38 06 69 3c-a8 c3 4b 16 e2 e8 15 eb   #SH.8.i<..K.....
   0060 - 13 8d 83 b0 13 cb ac 98-76 25 da 69 fd 2a 64 aa   ........v%.i.*d.
   0070 - 2c dd 1a e5 e2 61 4c 9a-93 d6 d8 1b 56 be 44 00   ,....aL.....V.D.
   0080 - 53 bd 28 b1 5a c4 5d 42-df 67 89 89 56 65 aa 95    S.(.Z.]B.g..Ve..
   0090 - 10 29 cc 18 be 52 b8 c8-eb 7e 74 46 9e be 57 39     .)...R...~tF..W9

   Compression: 1 (zlib compression)
   Start Time: 1329218719
   Timeout   : 300 (sec)
   Verify return code: 18 (self signed certificate)
---
+OK OPS335 Dovecot ready.
USER ops335
+OK
PASS seneca99
+OK Logged in.
LISt
+OK 1 messages:
1 722
.
QUIT
DONE

Testing IMAP port 143

• telnet 192.168.122.184 143

Testing IMAP port 993

• openssl s_client -connect 192.168.122.184:993