![SOLVED] Microsoft SMTP Relay (550 5.7.64 TenantAttribution; Relay Access Denied SMTP) - Email Servers SOLVED] Microsoft SMTP Relay (550 5.7.64 TenantAttribution; Relay Access Denied SMTP) - Email Servers](https://content.spiceworksstatic.com/service.community/p/post_images/attached_image/02c9040c-30e6-4df7-bd1a-9ba53f2496af-mail.png)
SOLVED] Microsoft SMTP Relay (550 5.7.64 TenantAttribution; Relay Access Denied SMTP) - Email Servers
![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
Unable to send email from Plesk server using Outlook as mail client: 554 5.7.1: Client host rejected: Access denied – Plesk
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