Maileri

I think you meant "mailer"!

A mailer is a device or system used to send or receive mail, such as:

1. A postal mailer: a device used to send mail, like a mailbox or a mail slot.
2. An email client: a software application used to send and receive email, like Gmail or Outlook.
3. A mailer daemon: a software program that handles the sending and receiving of email messages.

If you meant something else, please let me know!