/// <summary>
/// Method will load IP addresses from the database if required.
/// This method should be called before doing anything with the
/// private IP collections.
/// </summary>
private static void LoadVirtualMtas()
{
if (_vmtaCollection != null &&
_lastGotVirtualMtas.AddMinutes(MtaParameters.MTA_CACHE_MINUTES) > DateTime.UtcNow)
{
return;
}
_outboundMtas = null;
_inboundMtas = null;
_vmtaCollection = DAL.VirtualMtaDB.GetVirtualMtas();
}
/// <summary>
/// Gets a collection of IP address that can be used
/// by the MTA for sending of messages.
/// </summary>
/// <returns></returns>
public static VirtualMTACollection GetVirtualMtasForSending()
{
LoadVirtualMtas();
if (_outboundMtas == null)
{
_outboundMtas = new VirtualMTACollection(from ip
in _vmtaCollection
where ip.IsSmtpOutbound
select ip);
}
return(_outboundMtas);
}
/// <summary>
/// Returns a collection of IP addresses that should be
/// used by the MTA for receiving messages.
/// </summary>
/// <returns></returns>
public static VirtualMTACollection GetVirtualMtasForListeningOn()
{
LoadVirtualMtas();
if (_inboundMtas == null)
{
_inboundMtas = new VirtualMTACollection(from ip
in _vmtaCollection
where ip.IsSmtpInbound
select ip);
}
return(_inboundMtas);
}
