It has been discovered that a recent automatic security update caused an issue where mail was unable to be sent between 7am and 10am on Wednesday, May 25, 2016. Only attempting to send mail during this time was affected.
If you experience a problem using webmail, please inform the Helpdesk.
Also, please keep in mind that Connect IN currently limits the size of attachments to 5 megabytes and the size of mail accounts to 5 gigabytes.