Starts sending STARTTLS command to SMTP server.

C# | Visual Basic | Visual C++ | F# |
public bool StartTlsAsync( SMTP_Client..::..StartTlsAsyncOP op )
Public Function StartTlsAsync ( op As SMTP_Client..::..StartTlsAsyncOP ) As Boolean
public: bool StartTlsAsync( SMTP_Client..::..StartTlsAsyncOP^ op )
member StartTlsAsync : op : SMTP_Client..::..StartTlsAsyncOP -> bool

- op (SMTP_Client..::..StartTlsAsyncOP)
- Asynchronous operation.

Boolean
Returns true if aynchronous operation is pending (The CompletedAsync event is raised upon completion of the operation). Returns false if operation completed synchronously.
Returns true if aynchronous operation is pending (The CompletedAsync event is raised upon completion of the operation). Returns false if operation completed synchronously.

After successful STARTTLS all SMTP session data(EHLO,MAIL FROM, ....) will be reset.
If unknwon(not SMTP error) error happens during STARTTLS negotiation, SMTP client should disconnect.

Exception | Condition |
---|---|
ObjectDisposedException | Is raised when this object is disposed and and this method is accessed. |
InvalidOperationException | Is raised when SMTP client is not connected or connection is already secure. |
ArgumentNullException | Is raised when op is null reference. |
Assembly: LumiSoft.Net (Module: LumiSoft.Net.dll) Version: 4.5.5510.19119