Impact Level: MEDIUM
Fix Found: YES
Fix Complexity: EASY
Bug Description
When you send an email it bounces back, with the error “Invalid HELO Name” or “Invalid EHLO Name”.
Symptom
You are unable to send emails to certain people as they just bounce back, this is due to a bug in the EHCP force setup routine that sets the postfix myhostname option to your server name, this needs to be an FQDM (Fully Qualified Domain Name), such as mail.mydomain.com.
The Fix
Connect to you server using PuTTY and issue these commands to set the myhostname setting in postfix, replacing MyDomain.co.uk with your actual domain name.
sudo postconf -e "myhostname = mail.MyDomain.co.uk"
sudo service postfix restart
Your email system should now be fixed.
For more information on this, please see my blog.
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