mujMail

A Java mobile email client for all

Development version 1.08.08 (2009-04-02) - Stable version 1.07.02 (2009-03-20)

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FAQ

Table of Contents

Questions

1. I can't connect to server when SSL is enabled.
   I always get an error like "Certificate is not trusted/recognized" or "java.microedition.error.pki.certificate".
2. I can't send a mail. How should my SMTP settings be?
3. I can't use Hotmail, why?
4. What is my mail account's server settings?
5. What mujMail can't do?
6. I have a BlackBerry and I get "control flow verification information" error.
7. I have a Nokia and when I connect to the server I get "connection timeout" error (maybe it happens with other brands as well).
8. Touch screen don't work.
9. I want to contribute to the mujMail source code. How can I create the project (MIDlet) in NETBEANS?
10. How can I set up the language of the project (MIDlet) in NETBEANS?
11. How to create project in Eclipse?

Answers

• 1: That's because your phone doesn't trust the server you're connecting to. You have to install server's certificate to your phone.
  ie: you've got problems with Gmail, you'll find Gmail's certificate by googling "gmail certificate download" at this address:
  http://www.ocasta.co.uk/Equifax_Secure_Certificate_Authority_DER.cer
  Now point your phone's browser (default built in browser!) to the address and follow the instructions on the screen (installing certificates methods may differ on different devices).



• 2: Mostly sending fails due to bad SMTP server setting. Note that in some cases cell phones carrers are blocking sending mails from other smtp servers than theirs.
  It should look like: smtp.your_carrier.something. You can easily find it out by googling it.
  For example, if I want to know SMTP server of Vodafone CZ, I'll google "SMTP server Vodafone CZ".
  Here's a list of some SMTP servers



• 3: Microsoft's Hotmail uses HTTP protokol for retrieving mails. Our client currently supports only POP3 and IMAP.
  We're really sorry. But the project is open source and this HTTP protokol may be supported in the future.



• 4: Well, it depends on where you have your mail account. Mostly you can find it in the Help section of server.
  Please don't forget to activate/enable POP3 or IMAP access to your mail box at the website of you mail box!



• 5: OK, there's always something that mujMail can't do.
  Stuffs that we want it to be capable are sending mails with attachments; sending fotos, videos, files from the phone; saving attachments to the phone; displaying more multimedia types (currently only some pictures are supported).
  Thats what we're currently working on. But hey, that's why it's opensource, all you guys can join the project and make it better ;)



• 6: The problem is very common with BB but unfortunately we don't know why it happens on BB.
  There are some topics about this issue at Internet forums, maybe other BB owners will help you.



• 7: This is very strange error, as it happens and doesn't happen on some Nokias of the same series. Like mujMail works fine on my friend's N70 but doesn't work on other friend's N70.
  We think that's because of phone's bad implementation of connection to the Internet and firmware update would help, or bad application/phone settings.
  Update: this issue has been fixed in current stable and development version.



• 8: mujMail doesn't work correctly on devices with touch screen. Some mujMail specific graphic elements need to be controled only from keypad.
  We plan add support for touch screen devices into new versions.

  Update: development version of mujMail now works with touch screen phones.

 

• 9:  

  A. Download NETBEANS with mobility pack

  B. Create new project 

  1. File → New project → Mobility → MIDP application → Next 
  2. Tick off Create Hello MIDlet → Next 
  3. Device configuration: cldc 1.1, Device Profile: midp 2.0 (for stable version: midp 1.0) → Finish

  C. Copy all source codes to the directory src of the new project.

  D. Set up the project

  1. Right click to the project → Properties
  2. Platform: Optional Packages

     tick off all except File Connection and PIM Optional Packages (4. item in NB 6.5) and Mobile Media API (9. from the end)

  3. Application Descriptor → Attributes: General Attributes for JAD and Jar Manifest:

     midlet-name: mujMail
     midlet-Vendor: Students of www.mff.cuni.cz
     version: 2.xx

  4. Application Descriptor → MIDlets → Add:

     midlet-name: MujMail-dev
     midlet class: mujmail.MujMail
     midlet icon: /icons/logo.png

     If you want to run unit tests, add unit also the midlet that runs unit test. Application Descriptor → MIDlets → Add:

     midlet-name: Unit tests
     midlet class: test.TestingMidlet
         

  5. Build → Sources Filtering

     Untick folder lib and doc 

     If you want not to run tests, untick also folder test

  6. Build → Compiling:

     tick Compile with Optimalization
     Encoding : UTF-8 (for stable version: Cp1250)

  7. Build → Libraries and Resources:

     Add Jar/Zip → Add the library(ies) from ./src/lib 

  8. Build → Obfuscating:

     For production version set obfuscation level to high, for testing and development set obfuscation level off. Note, that it is not possible to run unit tests when obfuscation level is setted to high (tested on JDK6 and WTK 2.5.2).

  9. Build → Creating JAR:

     Tick Compress Jar

  10. Press OK

  E. Build → Build main project

 

• 10: Untill now, there are 9 languages available: English, German, Italian, Polish, Czech, Slovak, Hungarian, (Brazilian)Portuguese, Chinese. Find the appropriate language class in www.mujmail.org/jar/current/stable/src/lang.zip and replace it with the Lang.java file in the source directory where you have the mujMail source code. Do not forget to rename the class (for instace, from LangEN to Lang).