Created attachment 1326 [details] look_at_red_arrows_1_GB Please see the attachment. The red arrow points to the size of the first message in my inbox. The size is 1 gigabyte! I believe this is a bug.
Can you reproduce this at will? (by deleting all configuration and starting fresh)
I think this is fixed in 3.12.0-1. Feel free to reopen if the problem persists.