lukwebsforge / justmail

A simple mail server written in Java

JustMail

An unfinished attempt at creating a fully integrated mail server supporting SMTP and IMAP in Java.

Building

You can compile the mail server using Maven.

mvn package

The compilation process outputs the build artifact target/JustMail.jar which contains all dependencies.

The mail server can be started in the command line.

java -jar JustMail.jar

Implementation Status

Take a look at the project's issues to see which parts of the relevant mail standards are implemented.

justmail's Issues

ToDo: Junk check

• Reverse DNS
• DKIM (Min. 1024 Bits)
• SPF
• DMARC
• Compare header atrributes and the from and to attributes

REQUEST: Sieve Filter

ToDo: Outgoing mail support

• Relay mails to other servers if the user is authenticated
• Add the return-path
• Add a signature for the domain. See #5

ToDo: Automatic updater & installer

ToDo: Imap protocol

RFC 3501

• Mail Parser

Commands (sorted by state)

Any

• Capabiliy
• Logout
• Noop

Not authenticated

• Authenticate
• Login
• Starttls

Authenticated

• Append
• Create
• Delete
• Examine
• List
• Lsub
• Rename
• Select
• Status
• Subscribe
• Unsubscribe

Selected

• Check
• Close
• Copy
• Expunge
• Fetch
• Search
• Store
• Uid

ToDo: Console

Commands

• HELP
• STOP
• DOMAIN
• USER
• MAIL
• SENDMAIL

Other things

• Backspace / Del Support

ToDo: Cosmetic things

• A better error handling
• Log files
• More color for the commands
• Bootup animation

ToDo: Smtp protocol

Commands

• AUTH
• DATA
• EHLO
• HELO
• HELP
• MAIL
• NOOP
• QUIT
• RCPT
• RSET
• STARTTLS

EHLO Keywords

• 8BITMIME
• AUTH PLAIN
• CHUNKING
• DSN
• SIZE
• STARTTLS
• SMTPUTF8

Mail Header

• Timestamp

Other Stuff

• Save mails in external thread

ToDo: Webinterface