3 - SpamAssassin / procmail support
4 - Additional AUTH methods
6 - Verify sender address (domain, corresponding authenticated user)
7 - Temporarily unavailable (Test mode?)
8 - Reason for disconnect
9 - Proper handling of "ReqHELO" and "Unknown command"
10 - Log outgoing SMTP transactions
11 - Show delivery thread IDs
12 - Watchdog for delivery threads
14 - Show authenticated user in "Received" headers
15 - Delivery threads should finish sooner
16 - Ensure random spool object names
17 - Implement CHUNKING extension
18 - Implement more proper reactions for non-standard replies and sequence breaking
20 - Consider using FindFirstChangeNotification
27 - Option to disable MX lookups
28 - Separate config files or work directories supplied in parameters
29 + Process CTRL-C properly to quit from user mode gracefully
33 - Show true reverse hostname in "Received" headers
34 + Bind to user-specified IPs
35 + Option to add Reply-To header to forwarded e-mails
36 + Fix non-RFC-compliant handling of lines starting with dots
37 + Fall back to HELO when remote server doesn't support EHLO
40 + Change "Client disconnected, and thread exited successfully." to "Client disconnected."
41 + Fix "Internal error" bug - this should be a temporary failure
42 + Fix bug regarding simultaneous delivery to forwarded mailboxes
43 + Fix bug in DNSMX.pas: improper handling of MX precedence values larger than 100
44 + Fix bug regarding Policies/Hosts table not being case-insensitive
45 + Fix service mode not working when compiled with FPC 2.6.2!
46 + Alternate mailbox names with + signs (e.g. "megabrutal+games@domain")
47 + Domain-scope mailbox settings
48 + Improved Wine compatibility
49 + Consistent handling of local/relay spool objects
50 + Implement Win64 support
52 + Enforce ASCII printable characters in commands
53 + Developer comment for test/debug builds
54 + More efficient command-line parsing
58 + Show Message-IDs upon receipt
59 + Send one cumulative DSN when multiple recipients fail
61 + Add timestamp correction to "Received" headers
62 + Append "Original-To" header
66 + Reject HEAD and POST requests too
67 + Domain-specific mailboxes (virtual hosting)
68 + Correct incorrect timezone correction
69 + Correct bug in address interpretation
70 + Correct bug in spool iteration
71 + Write thread IDs in spool objects
72 + Append "Return-Path" header
76 + Meaningful status codes (in smtp.log)
77 + Accept mixed-case commands
78 + Correct bug in DNS MX queries
80 + Log SMTP responses on permanent status changes
81 + Don't remember status codes (never needed, only causes confusion)
84 + Disconnect HTTP agents
86 + Accept awkward AUTH LOGIN attempts
88 + Fix memory/handle leak
96 + Hide AUTH feature when no users
97 + Add protection against loops
98 + Ensure case-insensitive relay routes
102 + Fully support SIZE parameter
103 + Better support for 8BITMIME