Email and Spam Filtering

Thunderbird Setup

Click here for detailed directions for setting up Thunderbird Mail Client

Spam Filtering

The new puremessage spam filtering system seems to be working well, even with the low aggressiveness setting that was given to everyone. You can manipulate various email related functions with the coxeter commands:

  • spamfiltering (for setting the spam filtering aggressiveness level and controlling autodeletion and autoexpiration of spam messages)
  • maillistedit (for adding email addresses to your whitelist and blacklist)
  • forwardedit (for changing email forwarding)
  • vacationmessage (for sending vacation messages when you are away)

Type any of the above commands followed by the word show (e.g. spamfiltering show) to see your current status, or followed by help for more information. For complete information about your spamfiltering setup you can type spamfiltering showall. Note that email forwarding and sending the vacation message happens after spam filtering so less spam should be sent from our system to remote addresses now (this has caused problems in the past).

There is now a (minimalistic) graphical interface to configuring your spam filter settings on coxeter called spamfiltering_gui. Please see the IT Status Blog article at Controlling spam in your email for more information.

General Email Server Information

  • Incoming Mail Server: mail.math.toronto.edu using IMAPS (IMAP over SSL on port 993)
  • Outgoing Mail Server: smtp.math.toronto.edu using message submission (similar to SMTP) on port 587 using a secure TLS connection

The fingerprints for our email security certificate are:

  • SHA1: 61:60:97:43:D5:4E:7A:81:20:F9:96:4C:B4:E7:63:1F:61:53:D2:6E
  • MD5: D9:2A:2F:8B:C9:C7:20:7C:CE:70:D2:04:35:71:5A:EA

Although these fingerprints can in theory be faked by people trying to steal information.

The Certificate Signature Algorithm and Value:

PKCS #1 SHA-1 With RSA Encryption

Size: 256 Bytes / 2048 Bits
a2 64 e7 b1 9d 55 75 e5 b9 a0 ba 81 f6 f8 9f 29
c6 ea a9 d2 98 e8 92 84 1e 0a fc 4a 74 33 f2 53
22 18 cd ce f9 bd 68 38 a9 28 b6 17 81 43 eb a8
00 94 5e 32 72 a5 78 f4 9c 53 8f 5e 6a f5 8f c1
3c c3 3f 01 b0 c1 5f 40 06 76 0a ec 1a 65 ed 08
37 72 cd c5 0b 5a 61 d6 73 6c 8c 2f cf c5 b6 97
da 42 b4 e9 17 66 91 e2 f8 87 df e6 ac 7a 5a 78
2e 71 33 70 e4 78 b0 84 dc 58 60 f2 51 d0 af c9
6e d7 7e bb 59 3e 97 f2 2a 33 1b 8a b2 08 8d 4c
31 7c 91 35 42 2d f8 b8 f6 92 1c a2 0e df b5 11
ba 26 b2 71 ff 30 1e f8 43 9e 5c 6c 7b f4 7c 9d
f4 3e 29 fd f3 ad 98 4e 18 6f 22 fa 35 99 bb 73
f5 24 19 4d 24 d0 66 4e 52 13 6f 6f c8 22 92 10
da cb 37 d9 50 40 dc 90 75 f2 dd 45 c7 2d 12 9b
9d 08 37 60 74 c3 41 5c 02 30 d2 85 7e 61 2e a0
fd 14 6c 07 50 16 17 83 c7 ef 52 51 08 07 94 41

This complete certificate signature is felt to be secure.