Server Error: '554 5.7.1 [r8] Authentication Failed, Must Login.' Updated FREE
Server Error: '554 5.7.1 [r8] Authentication Failed, Must Login.' The "Server Error: Relay Access Denied 554 v.7.one" in Outlook occurs for two master reasons. The kickoff reason is that your outgoing mail server (SMTP) doesn't allow to send emails without user hallmark and the other reason is that your email address is marked at spam lists as a source of spam. This tutorial contains instructions to solve the following error, after sending an email: "Your message did not reach some or all of the intended recipients. The following recipient(s) cannot exist reached. Server mistake: 554 v.7.1 Relay Access Denied" How to fix Relay Access Denied Error in Mail. To determine the exactly reason of the Relay Access Denied 554 5.vii.1 fault and to resolve the problem follow the steps mentioned below. Step 1. Verify Mail Server Settings and Account Credentials.