We have a strange issue whereby if a user sends an email to another user within the organisation on the same server from both Internet Explorer and Firefox, only the Internet Explorer one can be read from within outlook.
The other email if you try to open within Outlook it says that one or more parameters are invalid. However, if the receiver opens their email from Outlook Web access it works and the email could be read.
Seems to be some incompatibilty when emails are sent from firefox and unable to be received. Has anyone else tried this or experienced it, and is there a cure?!