public override Task ExecuteAsync(CancellationToken token)
{
if (_builder.PendingMail != null)
{
return(_channel.SendReplyAsync(SmtpReplyCode.BadSequence, "MAIL not allowed now", CancellationToken.None));
}
Match fromMatch = s_fromExpression.Match(Arguments);
if (!fromMatch.Success)
{
return(_channel.SendReplyAsync(
SmtpReplyCode.InvalidArguments,
"Bad FROM address",
CancellationToken.None));
}
string sourceRoute = fromMatch.Groups[1].Value;
string mailbox = fromMatch.Groups[2].Value;
string parameterText = fromMatch.Groups[3].Value;
if (!string.IsNullOrEmpty(sourceRoute))
{
return(_channel.SendReplyAsync(
SmtpReplyCode.InvalidArguments,
"Return path not supported",
CancellationToken.None));
}
if (!TryProcessParameterValue(_channel, parameterText, out Task errorReport, token))
{
return(errorReport);
}
if (_channel.IsAuthenticated &&
!_userStore.CanUserSendAs(_channel.AuthenticatedUser, mailbox))
{
return(_channel.SendReplyAsync(SmtpReplyCode.MailboxUnavailable, "Invalid Mailbox", token));
}
if (!_channel.IsAuthenticated &&
_settings.LocalDomains?.Any(
d => string.Equals(
d.Name,
MailUtilities.GetDomainFromMailbox(mailbox),
StringComparison.OrdinalIgnoreCase)
) == true
)
{
return(_channel.SendReplyAsync(
SmtpReplyCode.InvalidArguments,
"Must be signed in to send from domain",
token));
}
_builder.PendingMail = new SmtpMailMessage(
new SmtpPath(
mailbox));
return(_channel.SendReplyAsync(SmtpReplyCode.Okay, token));
}
