• IMAP: POP before SMTP ("relay access denied")
• Activating SMTP Authentication To Other Mail Servers (Postfix)
• sendmail with SMTP, but without DNS
• SMTP-AUTH Client with Sendmail
• Sendmail: mail is returned
• sendmail: Sending Mail (SMTP)
• Configuring Evolution for SuSE Linux
• How to Activate the SMTP-Authentication on Other Mail Servers (Postfix)
• Setting Up Pop before SMTP on Openexchange Server