How come e-mail I sent from Yahoo mail box go into receiver email’s bulk folder?

I sent about 100 receiver, one on To field, the rest on BCC field,

HOw come?

HOw to solve this problem let email I sent able to enter their INBOX, not Bulk Folder.

Thanks.

It was spam, but not sent by me. How does someone get a hold of my email address and use it for spam? How can I stop this from happening?
Jay K: what do mean by “whoever i want,” hmmm?

I get the following message also with the bounced mail:
” The message carried your return address, so it was either a genuine mail
from you, or a sender address was faked and your e-mail address abused
by third party, in which case we apologize for undesired notification.

We do try to minimize backscatter for more prominent cases of UBE and
for infected mail, but for less obvious cases of UBE some balance
between losing genuine mail and sending undesired backscatter is sought,
and there can be some collateral damage on both sides.
Delivery of the email was stopped!”

I get two email one from Nizeria another Soth Africa subject to the matter regarding Lotto winners. How can I know about the actual matter

Junk mail unknown sender spam unwanted email trash scam

I want to get a new e-mail account, but I want the mail being sent to my existing one to send to my new one instead. This possible?

I have a tshirt screen printing and embroidery business, and want start a printed newsletter. Not email newsletter. I am looking for a good template or software that I should use on my Mac. Thanks

Mac mail and yahoo. Trying to enable Mail to use my Yahoo to send and receive messages when I click on websites contact icons.

Sometimes there are over 164 in a couple of hours. I can’t stand it.

getting ads in my bulk mail with my email address as the sender