Recent we have started adding X-Virtual-mta as header while sending email using Mailkit.net.smtp client.

I have few question on this, like can value of this Header key be retrieved while we are using Mailkit.Net.smtp.SmtpClient() in the C# ?

Do we need to configure SMTP client or any of its MTA so that it can know about X-Virtual-mta value?

If SMTP client is entirely not configured, how this can be configured?

My currently knowledge about MTA or SMTP is limited but I will appreciate any help on this question?

Expecting some help on this question.