Yahoo! mail is a popular and trusted, feature rich email service by Yahoo search engine. Yahoomail serves with multiple features that saves time and keep the mails organized. One can keep both inbox as well as archived mails in the all mail tab. To manage your mails better you can also set up separate folders. No doubt it’s a very smooth mailing experience for Yahoomail user but its technical limitations such as Account temporarily blocked from sending messages, unnecessary threaded mails, etc.
If you don’t send a single mail to a large amount of persons then it may be possible that your account has been hacked. There are mediums for getting help, like the online directory Contactforhelp for reliable Yahoo mail customer service number which provides Yahoo customer service for USA and Canada.