Failed to read beginning of SSL/TLS record – can be caused by External Firewall

If the problem is with Office365, such as with SendEmail to, port 587, then updating to Chilkat v9.5.0.93 or later will solve the problem. For example, if you see the following, then update to v9.5.0.93 or later. … ensureSmtpSession: ensureSmtpConnection: smtpParams: SmtpHost: SmtpPort: 587 SmtpUsername: … SmtpSsl: 0 StartTLS: 1 –smtpParams smtpConnect: smtpHostname: smtpPort: 587 connectionIsReady: SMTP […]