I’m not using Google Apps so unfortunately, the solution doesn’t apply to our issue.

We have already been de-listed as we check at IP Reputation Investigation http://ipremoval.sms.symantec.com/lookup/.

But we still have issues sending email to some domain emails.

This concludes that even Symantec de-lists your IP, it doesn’t apply it to their clients’ system.

Do you agree?

If so, I think the issue really is with Symantec to apply the updates onto their clients’ system.

Any comments on this?