IIS

Articles about using the IIS web server on 1&1 Cloud Servers, including how to add websites to Windows Server, how to use and manage IIS application pools, and more. Internet Information Services (IIS) for Windows Server is a flexible and secure web server which is easy to manage and scale. [...]  

Troubleshoot SMTP Error 550 "Relay Denied"

Learn how to resolve the common e-mail error SMTP 550 "Relay Denied." This error most often happens because of a failure to correctly authenticate with the SMTP server. Learn more about SMTP authentication methods, and how to resolve this error. [...]  

Email Protocols: POP3 vs IMAP

Learn about the difference between POP3 and IMAP e-mail protocols, find out which one will serve your needs best, and learn about the potential consequences of your users choosing one over the other. [...]  

Managing Email on 1&1 Cloud Servers

Learn more about using email with a 1&1 Cloud Server account, including how to set up and use the 1&1 Webmail included with each account, how to configure the DNS and firewall if you prefer to host your own email server, and more. [...]  

Read More