I'm not sure why you would ever want so many yahoo accounts so that you have to ask the question how many you are allowed to have. but I'm sure you can have a very large amount of them; I'm sure you might get flagged if you're opening hundreds on the same IP address, though.
i have only 1 yahoo account to use my yahoo messenger, but i have a passion , it's collection the " illegal yahoo id" like number, dash ( for example : star-secret )
I have only one account on Yahoo and I think that is more sufficient for me as for my daily mails and updates, I received in my inbox.
Well, i have 10 accounts, and it did not happened anything. So it is ok if you want to have more than one account
i think there iznt any limit of creating the accounts on yahoo. You may create many accounts from the same computer or ip.... But my friend... i dont think so that u will need hundreds of accounts on yahoo... i think one or two or at best three are enough for a person.....
There is no limit to the number of accounts you can create. Although, if you create too many too quickly from the same IP, they may temporarily block your attempts. The OP is obviously needing the accounts for mailing, or other bot activities and it was a very valid question. I have thousands of accounts specifically for these purposes.
You can even have 100 accounts. No problem, Because some people need seperate yahoo for their different business, so yahoo does not limit.
i think that is one mail address of one site like yahoo is ok , more is not ok. why you think that more than one is useless, that's not true because there is many sites like social network site register you by a mail address and if you are seo people you can use it to make different power backlink to your sites and etc... but if u want use mail address to only write letter to friends , that's ok one is enough.