You quote a disparate list of modules that suggest you don't have a firm idea of what you want to do and how you plan to implement it. But you did say you want to learn....

The modules broadly do:

# access POP3 mail, enumerate, download, delete
mail-pop3client 2.15

# validate email addresses
email-address 1.2
mail-rfc822-address 0.3

# sendmail to an SMTP server
mail-sendeasy 1.2
mail-sender 0.8.10
mail-sendmail 0.79

# mish mash of above
mail-box 2.054
[download]

The first thing to do is decide WHERE your tool is going to run, and how users interact with it. This will typically be either client side or server side, although a combo of clientside and server side is possible if you want to make it really complex.

As you are running on Windows, Mail::SendMail probably wont be of much use, since it requires a local sendmail installation, I think. Also, since you say you want to check accounts and delete mails, why have you listed mail sending tools at all? Mail::Sender, Mail::SendEasy and Mail::SendMail are all useless to you for your stated goal.

Mail::Box seems to be mostly for handling local mbox or maildir type mailboxes, usually found on unix-like systems. I doubt this would be all that useful on a Windows system.

All you actually need is something to contact your email account(s), like Net::POP3 or Mail::Pop3client, and something to parse the actual mails. ie MailTools.

C.