As stated above, i'm not sure if this is actually the case, but i'd be slightly worried if it is, since that would imply that there (potentially) really is no such thing as *privacy* while using electrum without a proxy.
It's weird how there's nothing available on this topic, especially if what pooya87 is saying is true. (Think about the information a single node could possibly gather about it's users right?)
Exactly. Thanks for providing this information. Strangely enough, I was under the impression the there should be some privacy still present while using electrum. So their servers may choose to keep my data if they wanted, or they may choose to delete it. No, that it matters too much to me personally, but in any case it's good to know.