I get a lot of inquiries from people using yahoo email addresses. When I respond the email bounces back to me via maelor demon.
On occasion I have had trouble with hotmail.
Today I am also have trouble with aol email. I replied to one gent and the email bounced back to me. I tried again and email still bounced back.
There are some individuals who are ready to accuse me of slacking and not responding to their emails. Well that is not true. I am very responsible responding to all emails in a prompt fashion.
There are other email options out there such as gmail. There are a lot more than I have mentioned.
I have a yahoo account as well. Lately, I have found that email that I sent out over a week ago was never received via this yahoo account.