I get an error when sending email.

Other homeseer email events work so mail is setup right.

I have had issues with email for long time. After reboot of HS, first email is sent then nothing after first. I get this error.

Exception sending email via smtp.comcast.net (To:myaddress@domain.com, cc:, bcc:, Sub:Computer - BLLAN Living Room TV (x.x.x.x) - ONLINE, Attach = Argument passed in is not serializable. Parameter name: value