I have a client who uses Office 365 for email. Using the basic phpMail config in Craft fails when I try to direct an email to any of the clients email addresses, including user registration and, more importantly, when sending a message from the Contact Form plugin.
I have tried in vain to change the Craft email settings to SMTP, using credentials that have been tested with a desktop email client. I am sure there is something I am missing, e.g. some server config thing.
Any advice would be greatly appreciated!