Using Electrum 4.0.2 I accidentally sent coins without a fee to another wallet of mine. Now that transaction is showing as Pending underneath the Send tab in the Outgoing Payments section. RBF is does not seem to be available as there is no transaction for this request showing in History and when I double click the date section where it says Pending, nothing happens. The coins are still sitting in my Electrum wallet and there are 0 transactions recorded on Blockchain.info so my question is this: if the transaction never gets confirmed and drops out of the mempool, will Pending change to something else, i.e. unconfirmed or unsuccessful, thereby allowing me to resent the transactions with the appropriate fees?
Also, do all transactions have to have a signature? What happens if they don't?
Many thanks in advance for your help.