I am having sporadic issues with my Exchange 2003 mail server running on Windows SBS 2003. Every so often I will get an email from one of our clients that has the domain of zahav.net.il, which is based in Israel and I am based in the US, and they state that they received a non delivery report when sending to my domain with error code 4.4.7.
This is only sporadic, and sometimes I do indeed receive emails from them, and other times not. I am running Exchange 2003 version 6.5 SP2. This is really one of the only domains I seem to be experiencing issues when receiving. I have gone through my local mail queues and cannot find a single instance of the failed message. It's like it doesn't even hit my Exchange server. At first I was thinking that this is an issue with their mail server, but I have been made aware that the 4.4.7 errors seem to be related to the "receiving" server and not the "sending" server. I have checked to make sure my domain is not blacklisted, which it is not, and I also have the correct PTR record set on my domain.
Any help with this is greatly appreciated as I am at a stand still on what to test and troubleshoot any further. Thank you.
Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it.
The vast majority of email clients display l…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers.
According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…