Error sending e-mail. The SMTP server has unexpectedly disconnected.

Hello,

It means that it's something wrong with the e-mail account configuration. I suppose it's something related to that setting "Secure socket options (specify the SSL and/or TLS encryption)". The mentioned error means something like that "Forcing Non-SSL On An SSL Port". Please try to set the "Auto" value in Secure socket option", it's the safest way.

System.TimeoutException: The operation has timed out. at MailKit.Net.SocketUtils.ConnectAsync(String host, Int32 port, IPEndPoint localEndPoint, Int32 timeout, Boolean doAsync, CancellationToken cancellationToken) at MailKit.MailService.ConnectSocket(String host, Int32 port, Boolean doAsync, CancellationToken cancellationToken) at MailKit.Net.Smtp.SmtpClient.ConnectAsync(String host, Int32 port, SecureSocketOptions options, Boolean doAsync, CancellationToken cancellationToken) at Grand.Services.Messages.EmailSender.SendEmail(EmailAccount emailAccount, String subject, String body, String fromAddress, String fromName, String toAddress, String toName, String replyToAddress, String replyToName, IEnumerable1 bccAddresses, IEnumerable1 ccAddresses, String attachmentFilePath, String attachmentFileName, IEnumerable`1 attachedDownloads) at Grand.Services.Tasks.QueuedMessagesSendScheduleTask.Execute().

HI..
why this error occurs ? and this may cause my site was down everytime?

bedh wrote:
Looks like configuration is wrong. Need to look again into.
If you need help, we may support you but that is paid support.

bedh wrote:
It may, depend on machine you have. The most easy way to check - disable task of sending emails and restart application.