Yahoo Not Accepting Emails

[Mohan]

Hi

I have a list of 1,50,000 yahoo emails (yahoo.com, yahoo.co.in, yahoo.co.uk) and my ISP do not place any email limits. Means I can send unlimited no. of emails per day. But yahoo is bouncing back all the emails with some "delievery not authorized" message. Please tell how many emails I can send per hr/day to:-
yahoo
gmail
hotmail

 

[stanbusk]

Those systems detect how many messages are sent to their servers and how many of those messages are sent to deactivated or bad addresses. If you reach a given threshold, messages will bounce. The threshold is high enough to let go regular messages and small bulk emailing. Your list is huge so you should ask them to be added to their white list.