Mailroom clerks are support personnel who manage incoming and outgoing mail for a company or organization. Internal and external mail for larger companies generally arrives in a central mailroom. From there, a mailroom clerk receives and sorts mail and packages for these companies or organizations, and may also deliver mail to individuals or departments. Mailroom clerks determine and apply postage for outgoing mail, maintain a record of postage paid and owed by departments and individuals, and have an understanding of which delivery service best suits outgoing packages.