ConnectAsync seems to hang.

[nilankadharmadasa]

Hi,

If I use ConnectAsync, it hangs.
If I use, Connect or ConnectAsync.Wait, it works.
Timeout for _smtp_client is set to 5000.
What could be the issue here?

The host is smtp.office365.com and the port is 587.

My code:

        public async Task ConnectAsync(string host, int port)
        {
            try
            {
                await _smtp_client.ConnectAsync(host, port, SecureSocketOptions.StartTls);
            }
            catch (SmtpCommandException se)
            {
                WrapSmtpCommandException(se);
            }
        }

[jstedfast]

If I use, Connect or ConnectAsync.Wait, it works.

That tells me the problem is the way you are doing threading in your app.

Try:

await _smtp_client.ConnectAsync(host, port, SecureSocketOptions.StartTls).ConfigureAwait (false);

[nilankadharmadasa]

Thanks. That was the issue.