E-mail notification failure to send

[Ed Cackett]

Hi, up until recently ACP was successfully sending email notifications throughout the night. But, now e-mails are failing to send and we are getting an ‘Authentication failed because the remote party has closed the transport stream.’ message. Our university email is managed by Microsoft and the IT support at our university told us this failure was because ACP needs to use TLS 1.2 or greater for outbound SMTP. Is this the case? Any thoughts on a fix? Email alert settings attached.

Thanks for you help!