private Message SendMessageWithSignature(string plainTextSignature, string htmlSignature, string message)
{
_domain.SignatureEnabled = true;
_domain.AddSignaturesToLocalMail = true;
_account.SignatureEnabled = true;
_account.SignaturePlainText = plainTextSignature;
_account.SignatureHTML = htmlSignature;
_account.Save();
SmtpClientSimulator.StaticSendRaw(_account.Address, _account.Address, message);
return(CustomAsserts.AssertGetFirstMessage(_account, "Inbox"));
}