Our emails to one client keep bouncing back. The message source says: Final-Recipient: xxx@xxx.com Action: failed Status 5.50 Diagnostic-Code: smtp;550(blu0-omc2-s11.blu0.hotmail.com)[65.55.111.86]: 6620 is currently not 550 permitted to relay through this server. Verizon Fios is our internet provider and claims the problem is not with our internet access. Our email service is hotmail. Can someone please help?
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