Email App used 1200mb of data since 9/4/2011

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On Saturday I had used 426mb of data on my AT&T plan and my cycle ends tomorrow. Purchased Galaxy S2 phone on Sunday at around 11:30am. The guy at BestBuy original set up my accounts email etc.. Yesterday I got a text from AT&T stating that I had used 80% of my data plan. This morning at 9:27 I got another text from AT&T stating that I had used 90% of my data plan. I then recieved another text at 11:13 stating that I went over my limit and was going to be charged $10. Now the kicker is my cycle starts tomorrow so I was not that worried about the 90% limit that I hit earlier because I figured tomorrow it would reset anyways. Well after the last text I tried to figure out what app may be causing the issue and I downloaded an app called "My Data Manager" it showed that my email app was the culprit. The amazing thing is I kept refreshing the app every few minutes and It showed that my email app was averaging 8mb of data used per minute. I quickly did a hard reset and started using the gmail version of the mail app and I have not had a problem. Funny thing I was wondering over the course of the last 2 days why my battery life was horrible and my phone would get extremely hot sometimes. Earlier today I even took a risk and purchased the only extended battery I could locate for this version of the Galaxy on Ebay. Come to find out the email app that comes on the phone could have been the cause for all of my issues. I have also noticed such a drastic change in battery life since I reset my phone.

I also want to say that I did go into settings and made sure back ground sync was turned off before resetting the phone. When I opened the email app to go into the settings to remove my account information the data literally started churning away immediately I had a Samsung Captivate prior to this phone and I have never ever had this problem before. Called AT&T to see if they could at least get rid of the charge based off the fact that I typically only use 1gig of data monthly and they should be able to tell that using 400mb per day was not normal based on my past. No dice but I am just glad I was able to figure out the problem.

It totally depends what types of email account you set up and whether or not you're using Push email (GMail is push email). And what email server you're hitting. Yahoo, for example, has been blamed for its faulty IMAP server implementation in the past.

Thanks. I did have my yahoo mail account synched as well so may that was the culprit. I may try and use the native application again this weekend to see if I can replicate the problem again and since I will be home I won't have to worry about burning thru my data plan.

If you have million emails all left in the inbox, they all have to be synced over to the phone when you first connect, especially you're not using GMail or any Exchange ActiveSync. Gmail will only sync recently mails until you need to read more. Exchange ActiveSync only syncs last 3 days of emails out of box unless you set it to sync all. You don't have that kind of control on other email types like POP3/IMAP emails.