i keep getting 100’s of junk emails for penis enlargement pills from all over the world how do i stop this and how do they get my email address?

tonight i have received at least 13 emails about demon mail/failure delivery. When i open them it appears that my email address sent these. How is this possible? They are for drugs, penis enlargement, porn sites, etc. What does this mean? Has someone accessed my account without my knowledge?? [...]

I get spam and penis enlargement offers.. the works.. from my own email address. How does that happen? I’m sure anyone can think up a smartass answer here but serious ones only please.

Web sites collect email addresses. They also guess at email addresses when sending such things out.
You can forward such email to spam@uce.gov
It does help. Spammers resist, which lets me know it helps more than we know. Spam to my email went down after I started forwarding it all to spam@uce.gov
I have set up a filter [...]

I keep finding inappropriate advertising when I log into my Yahoo e-mail account (e.g. rather raunchy male enhancement ads, etc). Is there anything I can do to prevent such ads from from appearing?

It was really, really kind of them to take the time to send it to me but how on earth did they know I need it?

My other yahoo account just sent everyone I know some junk mail to buy Male enhancements. This is so embarrassing. How did this happen? What do I do?