Email not working

I’m receiving the below message when trying to send invoices:

System.Net.Mail.SmtpException: System.Net.Mail.SmtpException: Server does not support secure connections.
at System.Net.Mail.SmtpClient.InitiateSecureConnection () [0x00020] in :0
at System.Net.Mail.SmtpClient.SendCore (System.Net.Mail.MailMessage message) [0x000a0] in :0
at System.Net.Mail.SmtpClient.SendInternal (System.Net.Mail.MailMessage message) [0x00050] in :0
at System.Net.Mail.SmtpClient.Send (System.Net.Mail.MailMessage message) [0x00091] in :0
at ManagerServer.HttpHandlers.Businesses.Business.Email.Post () [0x00626] in <129073f224614ffa9fe952936af29777>:0

Read the Guide about troubleshooting email. Then ask questions.

I have read the guide about troubleshooting and have tried everything suggested. Nothing works. Looking for constructive responses please.

Are you using your own server? The beginning of the error dump suggests that the mail server isn’t allowing SMTPS (secure) connections - untick the “Use SSL” option in E-mail Settings and try again.

No I did not select the SMTP option - well I did but that didn’t work so I thought I’d keep it simple and stick to the no-reply address but that one is not working either…

It could be a handshaking problem. Make sure that you have your computer set to the correct time zone (including daylight savings if applicable) and that your date & time are correct for that time zone; security handshakes rely on the time being the same at both ends.