Rockliffe MailSite SE is an affordable, easy to use standards-based email server for small businesses. Rockliffe MailSite SE is an award-winning Windows SMTP, POP and IMAP email server that also includes advanced anti-spam and anti-virus protection, powerful content filtering, multi-language webmail and push wireless email. Rockliffe MailSite SE works great with Outlook, Outlook Express, Eudora and Mozilla Thunderbird.