Snow Leopard server implements some good anti-spam measures, on top of all Greylisting.
But there’s a subtle issue with sending emails from Outlook, many users will get an error on the lines of:
helo command rejected: need fully-qualified hostname
In order to solve this open up:
sudo nano /etc/postfix/main.cf
Find this line:
smtpd_helo_restrictions = reject_invalid_helo_hostname reject_non_fqdn_helo_hostname
and change it to:
smtpd_helo_restrictions = permit_sasl_authenticated permit_mynetworks reject_invalid_helo_hostname reject_non_fqdn_helo_hostname
Restart the mail service.
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Thank you so much! Simple, clear instructions which worked first time.
THANK YOU. Also worked first time for me, damn Outlook…