MailKit.Net.Smtp.SmtpCommandException. Is it mapping 'Enhanced SMTP Returns' like 5.1.1 to traditional like 550 ?

[ruicaramalho]

Hello
I was treating the Exception return of SendAsync. The return string was:
5.1.1 The email account that you tried to reach does not exist.
After checking if the exception was MailKit.Net.Smtp.SmtpCommandException I was able to retrievet the StatusCode 550.
This is great it's what I need, I just want to uderstand how it happened.
Is your code Mapping Enhanced code to Traditional Codes in order to return them?

[jstedfast]

No, the SMTP protocol provides both the standard "Status Code" -and- the Enhanced Status Code when the SMTP server supports the ENHANCEDSTATUSCODES feature.

MailKit does not have to map between them.

[ruicaramalho]

Thanks for the quick answer and your great job with MailKit.

So how did I get the value 550 from MailKit.Net.Smtp.SmtpCommandException.StatusCode if the return msg was:
5.1.1 The email account that you tried to reach does not exist ?

Was the real return 550 5.1.1 The email account that you tried to reach does not exist combined?

[jstedfast]

Yes, the real response from the server was 550 5.1.1 The email account that you tried to reach does not exist

[ruicaramalho]

Thanks is clear now