Passwords should be changed every 1-2 months. Unfortunately, hardly anyone does it
A clean 'Sent' folder doesn't mean that the account wasn't hacked. I once had my account blocked because a bot cracked my password and started spamming. The admin reset my password and I noticed that the 'Sent' folder looked normal. He explained that it is possible in some cases to send without copying to 'Sent', or that the spammer (bot) deleted everything it sent to leave less traces.
Anyway, change your password
NOW, and next month too.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread