I set up Google apps standard for a voluntary organization and they have been using the email through Google apps for the last 12 months without any problem. Suddenly they started facing a problem that if they send email to some users outside their domain. The recipients are not receiving the email but if the same email was sent through the web mail, it is successfully delivered to the other party. What would be the reason?
The email client being used is MS Outlook 2010 with IMAP.