I have not changed any settings but I am unable to send emails. I am receiving emails fine. I checked with my service provider and they are not having any issues with my account and they can send from their webmail access to my account. I was able to send an email successfully at 1:30 pm today. It just stopped working. This full message comes up when I try to send an email... Sending of the message failed. The message could not be sent using Outgoing server (SMTP) mail.bluemarble.net for an unknown reason. Please verify that your Outgoing server (SMTP) settings are correct and try again.