Push sent emails deleting?

[Guest Dr Who]

I am using a free Mail2Web account and for some reason my sent emails have started deleting themselves after about a day or two. I am sure I have seen this somewhere on Modaco but can't seem to track it down. Anyone any ideas?

Just gone in to check my account online and I had ~1500 messages in the trash but also about 1700 in my inbox. I only have about 40 on my phone. I had assumed that if I deleted them on the phone it would delete from the online inbox? Checked options and can't see anything for this.