There is a high probability of Yahoo email account getting hacked/compromised all of the sudden due to numerous factors.  Users are unaware of the malicious activities conducted by malware, spyware and root kits in their Yahoo mail account that eventually lead to hacking of email account. The hacking activities are performed in such a way by scammers that it does not let users know about the compromise of their Yahoo email account. 

Signs/ Indications of Hacked Yahoo Email Account

Here are some indications/signs, which let users know that their personal or official Yahoo email account is hacked.

• Login account details have been modified.
• Successful login attempts made from an unknown location which you have never heard about.
• Yahoo email account used to send spam emails on the consistent basis.
• Messages sent to people in the contact list stored in sent folder which have not been sent by you.
• Failure delivery messages getting stored in your inbox.
• You aren't receiving expected emails.

Reasons behind Hacking of Yahoo Email Account

• Successful Login of email accounts accessing unsecured Free Wi-Fi connection sitting at the airport or at internet café. Keyloggers installed in public PCs detect the keywords and make modifications in password and email settings of Yahoo mail account.

• Same low diversity password being used in various email account can be the one of the main reasons behind the hacking.

• Unsecured password usage can also be one of the reasons behind the persistent hacking of your email account. Email account hacking is all due to your recklessness as case sensitive password is not applied to secure the yahoo mail account.

• Other reasons behind email account hacking are website spoofing as you may have shared details to the clone website thinking that it is the one which you access daily by inserting your login credentials.

Technical Problems Associated with Hacking of Yahoo Email Account

• Login issues in personal or official email account
• Unable to access important emails
• Data recovery issues arise with hacking of email account
• Unable to rectify spam filter issues
• Problems in sending and receiving important emails.
• Issues in modifying email settings
• Unable to recover yahoo email account after its sudden compromise.