Yahoo has provided smooth and integrated services in the mail for many years and practices the same in upcoming years. Yet, the mail face hitch while opening. Root of this type of problem coulb be network error, overflow of memory with unwanted files or cookies. But quick tweaks of these simple error is to recheck the network connection, empty cache, or input the mail account's correct credentials. And in any case, the problem was left unresolved. Users can freely contact the Yahoo customer care number to have the best assistance in any trouble.