![Error: "Send test email message: The server responded: 550 5.7.1 Authentication." When Setting up POP3 and IMAP Account in Outlook – KerioConnect Support Error: "Send test email message: The server responded: 550 5.7.1 Authentication." When Setting up POP3 and IMAP Account in Outlook – KerioConnect Support](https://support.kerioconnect.gfi.com/hc/article_attachments/360025841119/img70-mod.png)
Error: "Send test email message: The server responded: 550 5.7.1 Authentication." When Setting up POP3 and IMAP Account in Outlook – KerioConnect Support
![Unable to send email from Plesk server using Outlook as mail client: 554 5.7 .1: Client host rejected: Access denied – Plesk Unable to send email from Plesk server using Outlook as mail client: 554 5.7 .1: Client host rejected: Access denied – Plesk](https://support.plesk.com/hc/article_attachments/12377966045975/Screenshot_2.png)
Unable to send email from Plesk server using Outlook as mail client: 554 5.7 .1: Client host rejected: Access denied – Plesk
![email server - Changing hosts resulting in 554 5.7.1 <xxx@domain.tld>: Relay access denied - Server Fault email server - Changing hosts resulting in 554 5.7.1 <xxx@domain.tld>: Relay access denied - Server Fault](https://i.stack.imgur.com/XH22t.png)
email server - Changing hosts resulting in 554 5.7.1 <xxx@domain.tld>: Relay access denied - Server Fault
![SMTP -> ERROR: RCPT not accepted from server: 554 5.7.1 : Client host rejected: Access denied - YouTube SMTP -> ERROR: RCPT not accepted from server: 554 5.7.1 : Client host rejected: Access denied - YouTube](https://i.ytimg.com/vi/_fbGlVm8P2o/maxresdefault.jpg)
SMTP -> ERROR: RCPT not accepted from server: 554 5.7.1 : Client host rejected: Access denied - YouTube
![Error: "Send test email message: The server responded: 550 5.7.1 Authentication." When Setting up POP3 and IMAP Account in Outlook – KerioConnect Support Error: "Send test email message: The server responded: 550 5.7.1 Authentication." When Setting up POP3 and IMAP Account in Outlook – KerioConnect Support](https://support.kerioconnect.gfi.com/hc/article_attachments/360014267700/2019-08-12_15-24-22.png)
Error: "Send test email message: The server responded: 550 5.7.1 Authentication." When Setting up POP3 and IMAP Account in Outlook – KerioConnect Support
![Hello, I get this error 554 5.7.1 <******@seecharan.com>: Relay access denied for my domain - Gmail Community Hello, I get this error 554 5.7.1 <******@seecharan.com>: Relay access denied for my domain - Gmail Community](https://storage.googleapis.com/support-forums-api/attachment/thread-35187324-2774208878393240983.jpg)
Hello, I get this error 554 5.7.1 <******@seecharan.com>: Relay access denied for my domain - Gmail Community
![Unable to send email from Plesk server using Outlook as mail client: 554 5.7 .1: Client host rejected: Access denied – Plesk Unable to send email from Plesk server using Outlook as mail client: 554 5.7 .1: Client host rejected: Access denied – Plesk](https://support.plesk.com/hc/en-us/article_attachments/12377956157975/mceclip0.png)