The "undead emails" syndrome on my Droid

[rcellis]

Every once in a while I get a large email to my POP3 account which gets polled by my phone (using K-9) and even when I delete it using my desktop client software and the phone, it.. keeps.. coming.. BACK! :-) Even when I let the entire email download and then delete it, it would sometimes return. OK. Once in a while I can live with.. Recently I am now getting the same syndrome for several small emails. Anyone have an idea what's going on? Since the first of the year I'm getting the same emails over and over (usually once a day).