How to access original Postmark Api Http Response Code

[maelle9931]

Hi,

When sending an email, I would like to know if the postmark api returned a 413 so I can retry the message without attachments. However, it seems that the PostmarkResponse in this library does not include this.

The postmark api documentation lists nine possible HTTP response codes when sending an email, it would be useful to keep this accessible in the PostmarkResponse so that it can be handled appropriately.