Our office is having trouble sending emails to clients and keep getting this error:
[Return Code 554] sid: :: Denied [9fogic.net] (Mode: normal)
This has never happened before (years) and starting this morning, emails that go to the same clients as before are coming back now as Return Code 554: denied.
This isn't the case for all emails going out, and some are being delivered, but almost all are coming back with this return code.
It is happening on 3 different computers. One is running outlook 2010 and the other 2 computers are running outlook 2013. It is happening from 3 different email addresses as well.
I checked with our email hosting account and ran test emails through the web based server and they all worked fine. The issue is with Outlook.
Unfortunately, after I spoke with Microsoft they informed me I would have to pay $500 for an answer! We run a very small business and can't afford that!
Any help would be greatly appreciated.
Thank you.