Steps to use it:
- Install it.
- Choose your Gmail Account.
- Open the application, and fill the Send To: with the gmail id to which you want to backup SMS.
- Go to Menu "Login" (it is not an actual login, you need to configure your Gmail account for it).
- Login should enable the SMS folders dropdown with all your SMS folders.
- Select the folder to backup.
- Go to Menu "Sync SMS Folder". This should start the message conversion to mail format. Progress will be displayed.
- On completion it will prompt and then ask you if you want to sync.
- Syncing would send Emails with Subject IMAPSMS|<FOLDER NAME>: Sender and the body will contain Message and time, the subject should help you to create proper rules in your gmail account.

Setting up and scheduling:
- Open the app.
- Menu->Login.
- Select the Gmail account.
- Select the folder you want to sync messages from.
- Menu->Schedule->Set the time (if the time u set up is less than current it will set it up for next day else on the same day).
- Click Set, if succeeded it will show the scheduled time else will show the error.
- If you want to de-schedule it click de-schedule.
- Schedule will run the app at that time upload the text in mail and will try to sync. Sync will be successful only if u are connected to internet, this app won't automatically do it.
- Default limit of one time sync is 50 if you want to change it, after login select Menu->Message Limit and enter the number of messages u want to upload per sync. This will also be used in Scheduled sync.

Note:
Please configure your Gmail account first...

More info and screenshots here.

If you like this project, please consider donate to the developer.

Update Description:
v0.6:
- Added option to sync all folders.
- Added option to delete messages older than specified date after sync. NOTE: Deletion part still under testing, works well but still in case you have some important messages... keep a backup. All these settings also will be applied to scheduled runs.

v0.5:
- Option added to create threaded mails. (Conversation from a contact in a single mail). NOTE: Threaded mode mail wont work properly for Sent SMSes.

v0.4 Beta:
- Issue fixed which was reported on 9th Feb 2010.
- Issue from v0.3 fixed, sms folder dropdown list vanishes when scheduler option was clicked twice.

v0.3 Beta:
- Added scheduler.
- Added limit of messages to be synced up, default is 50 (no reason).
- Modified the message text when it was sent by you (Sent items).

v0.2 Beta:
- Fixed a condition where message syncing could have failed.
- App will rember the last user name and gmail account used.
- Will sync only those messages which were not synced (This needs to be tested).