"sent e-mails being returned undelivered

[DE-ANNE]

this started Wed for no apparent reason..most but not all are returned undelivered to my spam box..I sent one to myself got it ok..AOL sent me one and i replied..they got it ok so they said there is not problem.. BUT there is.. nearly all are still not being delivered.. i am receiving ok..
Any help pls as i am pulling my hair out.. In laymans terms as i know nothng about pc's...
I have an Acer latop.. and am with AOL ..NEVER had prb. before...thanks

[ACtheTROLL]

what sort of mails are being returned?
new mails to people ...
or replies to e-mails

is there a common factor ... [e-mail]
or all hotmail, yahoo, google?

[DE-ANNE]

any mail, dif addresses...

[rojash]

Many spam e-mails claim to be returned e-mails in an effort to get you to open them. Also many spam e-mails fake the sender address so that if they are bounced (returned by the server) they end up returned to entirely the wrong person - such as you!