PHP mail not sending to domain

Posted on February 17, 2015

I’ve configured all my store email (shop email, customer support, webmaster, etc…) to send from ‘support@storedomain.com’ which is the domain of by store ‘storedomain.com’

When ‘support@storedomain.com’ is the “from” email address, PHP mail reaches every email address we have tested (gmail, yahoo, other domains, etc.) but it DOES NOT reach and email address with “@storedomain.com”

When we change the “from” email address to any other not “@storedomain.com” email address, then the PHP mail reaches every email address including the email address with “@storedomain.com”

We have spent hours with Microsoft Exchange and decided it is not an exchange issue.

We cloned the store onto a local server and the email function works fine in both situations.

We believe it is a hosting server related issue. Any ideas on how to fix this issue?

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