ErrorCodesDeadDomainSmtpMXesInCache Field
It's known (from the DNS cache) that all DNS MX records for the domain point to dead hosts.

Namespace: MailBee
Assembly: MailBee.NET (in MailBee.NET.dll) Version: 12.5.0 build 687 for .NET 4.5
Syntax
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public const int DeadDomainSmtpMXesInCache

Field Value

Type: Int32
Remarks
It does not make sense to connect to any of the SMTP MX server of this domain since the previous attempt to do so failed and this fact was recorded in the DNS cache. The developer can use Clear and Timeout members of DnsCache class to affect this behavior.
See Also