A validation error occurred

I had noticed that this error was logging in the Application log of our CRM server very often. #9628 – An error occurred while delivering the e-mail message with subject "FW: Undeliverable: Read: " in mailbox email@ourdomain.com for delivery to http://localhost/CRM. System.Web.Services.Protocols.SoapException: Server was unable to process request.    at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)    at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)    at Microsoft.Crm.Sdk.Proxy.CrmService.Execute(Request Request)    at Microsoft.Crm.Tools.Email.Providers.CrmPollingMailboxProvider.DeliverMessageInternal(EmailMessage emailMessage)    at Microsoft.Crm.Tools.Email.Providers.ExchangePollingMailboxProvider.DeliverMessageInternal(EmailMessage emailMessage)    at Microsoft.Crm.Tools.Email.Providers.CrmPollingMailboxProvider.DeliverMessage(EmailMessage emailMessage)    at Microsoft.Crm.Tools.Email.Providers.CrmPollingMailboxProvider.Run()rn   0x80044331   A validation error occurred.  The length of the ‘messageid’ attribute of the ’email’ entity exceeded the maximum allowed length of ‘100’.   Platform The solution was to customize the Email Entity. The Email Entity Attributes: messageID Change the Message Maximum Length to 250 Save and Close Then Publish Although this fix will not track all messages of any length, it will help.