Errors Exceptions while sending email with MailKit in Net

In this article I will explain and provide solution for the possible errors (exceptions) occurring while sending email with MailKit in .Net.

.Net MailKit Error: 5.7.9 Application-specific password required

MailKit.Net.Smtp.SmtpCommandException: 5.7.9 Application-specific password required.

Solution: .Net MailKit Error: 5.7.9 Application-specific password required

.Net MailKit Error: Authentication failed

MailKit.Net.Smtp.SmtpCommandException: Authentication failed.

Solution: .Net MailKit Error: Authentication failed

.Net MailKit Error: 5.7.8 Username and Password not accepted

MailKit.Net.Smtp.SmtpCommandException: 5.7.8 Username and Password not accepted.

Solution: .Net MailKit Error: 5.7.8 Username and Password not accepted

.Net MailKit Error: An attempt was made to access a socket in a way forbidden

System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden by its access permissions 00.000.000.000:25

Solution: .Net MailKit Error: An attempt was made to access a socket in a way forbidden

.Net MailKit Error: sender@gmail.com No such user here

MailKit.Net.Smtp.SmtpCommandException: sender@gmail.com No such user here

Solution: .Net MailKit Error: sender@gmail.com No such user here

.Net MailKit Error: 5.7.0 Authentication Required

MailKit.ServiceNotAuthenticatedException: 5.7.0 Authentication Required.

Solution: .Net MailKit Error: 5.7.0 Authentication Required

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Errors (Exceptions) while sending email with MailKit in .Net