Forum Moderators: phranque
1) Email sent from our domain to hotmail.com IS delivered if sent via Outlook or Thunderbird
2) Email sent from our domain to hotmail.com IS delivered if sent via a script using the PHP5 mail() function.
3) Email sent from our domain to hotmail.com IS NOT delivered if sent via Squirrelmail
Could Hotmail be acting upon some SM header or anything like that?
We do have an SPF record, reverse DNS is setup properly, etc.