Hi! I have configured Squirrelmail+apache in a host A ip public=18.104.22.168 and Mail Server with postfix,courier in other host B ip public=22.214.171.124. I like try to connect Webmail squirrelmail host A with mail server host B. I have configured squirrelmail: Main Menu -- 1. Organization Preferences 2. Server Settings 3. Folder Defaults 4. General Options 5. Themes 6. Address Books 7. Message of the Day (MOTD) 8. Plugins 9. Database 10. Languages D. Set pre-defined settings for specific IMAP servers C Turn color on S Save data Q Quit Option 2 Server setting: domain rucoco.com ... ... imap_server mail.rucoco.com:143 ... smtp_server smtp.rucoco.com:25 ... ... utility courier I try to connect to host B ip public=126.96.36.199 very good but only read the mails, not send email from host A ip public=188.8.131.52. But I send mail from host B ip public=184.108.40.206, I can send email successfully. Can I help me?