public static bool UpdateMx(this ServerDns dns, string domain)
{
var utcNow = DateTime.UtcNow;
var hasChanges = false;
var dnsLookup = new DnsLookup();
if (dns.MxDateChecked.HasValue && dns.MxDateChecked.Value.AddSeconds(dns.MxTtl) >= utcNow)
{
return(hasChanges);
}
var mxRecord =
dnsLookup
.GetDomainMxRecords(domain)
.FirstOrDefault(mx => mx.ExchangeDomainName.ToString().TrimEnd('.').Equals(dns.Mx));
dns.MxVerified = mxRecord != null;
dns.MxTtl = mxRecord != null ? mxRecord.TimeToLive : Defines.ServerDnsDefaultTtl;
dns.MxDateChecked = utcNow;
hasChanges = true;
return(hasChanges);
}
public void GetMxRecords()
{
const string domain = "onlyoffice.com";
var dnsLoopup = new DnsLookup();
var mxRecords = dnsLoopup.GetDomainMxRecords(domain);
Assert.IsTrue(mxRecords.Any());
}
public void GetNoexistedDomainMx()
{
const string domain = "taramparam.tk";
var dnsLoopup = new DnsLookup();
var mxRecords = dnsLoopup.GetDomainMxRecords(domain);
Assert.IsTrue(!mxRecords.Any());
}
private ClientConfig SearchBusinessVendorsSettings(string domain)
{
ClientConfig settingsFromDb = null;
try
{
var dnsLookup = new DnsLookup();
var mxRecords = dnsLookup.GetDomainMxRecords(domain);
if (!mxRecords.Any())
{
return(null);
}
var knownBusinessMxs =
Defines.MxToDomainBusinessVendorsList.Where(
mx =>
mxRecords.FirstOrDefault(
r => r.ExchangeDomainName.ToString().ToLowerInvariant().Contains(mx.Key.ToLowerInvariant())) != null)
.ToList();
foreach (var mxXdomain in knownBusinessMxs)
{
settingsFromDb = GetStoredMailBoxSettings(mxXdomain.Value);
if (settingsFromDb != null)
{
return(settingsFromDb);
}
}
}
catch (Exception ex)
{
Log.Error("SearchBusinessVendorsSettings failed", ex);
}
return(settingsFromDb);
}