Known problems updating zywall firmware
If when looking at the source of your message you do not see our ' X-Headers', then this could be an issue with the default Header Promotion Mode Setting settings that Microsoft Exchange has in place.By default Microsoft Exchange 2007 sets these to ' No Create'.
This is a known bug in the Zyxel firmware and updating the Zyxel router resolves the issue, There appears to be a bug in the Exchange 2003 Small Business local NAT setup when redirecting traffic to an alternative SMTP port.If you've got an ssh host open to the internet at large, always disable root login and password based authentication.A year or so ago, my Synology NAS got hacked by a Bitcoin mining virus.Please ensure the outbound port is set to port 25 and negotiated SSL.More information is also available in the Reporting-MTA: dns;snt0-omc3-s14.snt0.Received-From-MTA: dns; SNT402-EAS413 Arrival-Date: Wed, -0700 Final-Recipient: rfc822;[email protected]: failed Status: 5.5.0 Diagnostic-Code: smtp;550 authentication"This is NOT a rejection from the Spam Experts system.Hotmail has the unusual behavior of delivering to the A-record instead of the MX-records if the nameservers are not set up 100% correctly.
Please check your nameservers to determine if there are wrong settings and to verify once that has been resolved.
Random timeouts after RCPT TO: may occur which is not reproducible from Telnet.
Changing Exchange to listen directly on the alternate port, bypassing the NAT port forwarding resolves this.
We currently have an open bug ticket with c Panel on this to have this resolved, however in the meantime it's possible to adjust your config directly to allow SRS to work, and continue to use sender verification on the Spam Experts system.
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