I'm having a strange issue where a recipients is having delays intermediately delays from e-mails we send out. I cant figure out what side its the issue is on. I see it passing through our SPAM outbound filters. They have Iron Ports but they seem to get through eventually. Ive attached a section of Header. Received: from cssmta3.csstrading.com (HELO mail.us.abnamroclearing.com) ([66.250.144.68]) by chj-ap-iron01b.chopperdev.com with ESMTP; 14 Feb 2012 19:04:13 -0600 Received: from fcuexc-srv01.fortisclearingus.com ([172.29.5.22]) by mail.us.abnamroclearing.com with Microsoft SMTPSVC(5.0.2195.6713); Tue, 14 Feb 2012 15:51:23 -0600 Received: from cssmta3.csstrading.com (HELO mail.us.abnamroclearing.com) ([66.250.144.68]) by chj-ap-iron01b.chopperdev.com with ESMTP; 10 Feb 2012 07:56:06 -0600 Received: from fcuexc-srv01.fortisclearingus.com ([172.29.5.22]) by mail.us.abnamroclearing.com with Microsoft SMTPSVC(5.0.2195.6713); Fri, 10 Feb 2012 07:53:09 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-Class: urn:content-classes:message MIME-Version: 1.0

Is this a single message header or two different messages? If they are two different message headers the problem appears to be with mail.us.abnamroclearing.com; the message took over three hours from the time abnamroclearing received it until it was finally received by chopperdev. it could be that chopperdev was not available to receive the message; if that was the case you should see something in the logs on abnamroclearing as it attempted to open a connection with chopperdev.TBrennan

Can you post the entire hearder for a message received after the delay, that header doesn't show everything.Sukh