Compromised Zoho Mail Account
Hi, Something has gone through my mailbox and collected all email addesses in emails sent to me. I have received a lot of backscatter indicating that emails have been sent with fake from/reply address to all the collected email addresses. These emails as I say have a fake reply as my email address and have been sent via other SMTP servers not Zoho as headers indicate and also nothing in sent items on mail account.
How were these email addresses obtained from my email account as I can't seem to see any unusual login/sessions in the activity history log?
Many thanks,