Yes we have a Reverse DNS record in place. No, we don't have SPF set up at the domain where the issue exists.
E-mails from my domain, harrisranch.com, make it to the problematic domain without getting the Verification failed NDR and I don't have SPF setup either. But I also have a SMTP content filter between our Exchange server and the internet where our other company doesn't. -----Original Message----- From: Dahl, Peter [mailto:[EMAIL PROTECTED] Sent: Friday, February 08, 2008 10:27 AM To: MS-Exchange Admin Issues Subject: RE: 550-Verification failed for Do you have Reverse DNS records for the sending e-mail domain? What about SPF? Maybe the recipient is looking for those to verify the connection before accepting messages from your server. -----Original Message----- From: Dean E. Lahodny [mailto:[EMAIL PROTECTED] Sent: Thursday, February 07, 2008 6:51 PM To: MS-Exchange Admin Issues Subject: RE: 550-Verification failed for Thanks for the information. I was able to get access to the Exchange server and I made the change, restarted the SMTP virtual service, and when I telnet to port 25 using the FQDN and not the IP address I get the FQDN name banners as expected but when I send an e-mail to the other domain I still get the 'Verification failed for. There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <mail.domain.com #5.5.0 smtp;550-Verification failed for <[EMAIL PROTECTED]>> I'll keep looking but if anyone has any other ideas I would appreciate the help. -----Original Message----- From: Micheal Espinola Jr [mailto:[EMAIL PROTECTED] Sent: Thursday, February 07, 2008 2:42 PM To: MS-Exchange Admin Issues Subject: Re: 550-Verification failed for You need to effect a change to the SMTP banner greeting. You can find the setting here: * ESM -> SMTP virtual server properties -> Delivery tab -> Advanced.. button -> Fully-qualified domain name (set this to reflect a valid public FQDN) On Feb 7, 2008 4:30 PM, Dean Lahodny <[EMAIL PROTECTED]> wrote: > One of our other companies, for whom I didn't set up the Exchange server, don't have control over, but have to tell them how to fix problems, is getting the following NDR when they send to or reply to e-mail at one specific domain. > > There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. > <server.domain.local #5.5.0 smtp;550-Verification failed for > <[EMAIL PROTECTED]>> > > The receiving domain the e-mail is being sent to is using Exim mail server software. > > After doing some research I am fairly certain the NDR is being caused by the Exchange server returning server.domain.local rather than mail.domain.com. But I haven't figured out how to get Exchange to return the correct name. > > How do I get the Exchange server to return the correct DNS name? > > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > ~ http://www.sunbeltsoftware.com/Ninja ~ > -- ME2 ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ *This email message is intended only for the use of the individual or entity to which it is addressed and may contain information that is privileged, confidential, or exempt from disclosure under applicable law. If you are not the intended recipient, any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error please notify us immediately by reply email or telephone and delete or destroy all copies of the original message ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ This communication is confidential and may be legally privileged. If you are not the intended recipient, (i) please do not read or disclose to others, (ii) please notify the sender by reply mail, and (iii) please delete this communication from your system. Failure to follow this process may be unlawful. Thank you for your cooperation. ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
