I need a solution
Hi there,
We run our email on office 365 and we keep getting -
550 5.0.350 Remote server returned an error -> 553 Message filtered. Refer to the Troubleshooting page at;http://www.symanteccloud.com/troubleshooting for more;information. (#5.7.1) |
Out clients can't send to us and they get the same error #5.7.1
This just started happening a couple of days ago and has never happened before. This only happens with symantec/messagelabs, every other email provider is fine. SPF and DKIM are fine, no blacklists.
How can we fix this? This is a huge pain and is disrupting our business.
Thanks.
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