My mailbox was flooded with spam, pornographic ads that were worsened by a bug (?) that re-sent the same mail 3-4 times to the same mail recipients. I downloaded and installed/run a trial-ware anti-spam software. From that moment, I could receive no mail at all. Un-installing the offensive software did not help and the Go online in Mailbox reverted immediately to Off-line. In one of the Mac/help/for "newbies" like myself/forums, I was advised to trash the com.apple.mail.plist and restart the computer. I did exactly that. This however, changed my e-mail address from firstname.lastname@example.org to email@example.com. (I don't mind and even like it). However, this e-mail address does not accept/recognize my password so I cannot receive mail. At this stage, none of my e-mail addresses is functional. I also please, please need genuine advice to help me to: (i) Regain access to my previous (hopefully still functional) e-mail address. (ii) Retrieve/import previously received and sent mail. Please, I am lost and need step-by-step instructions. I apologize if you receive this mail more than once.