![Solution: NDR Error "550 5.4.1 Recipient address rejected: Access denied" for one user - Exchange Office 365 Hybrid - TechLabs Solution: NDR Error "550 5.4.1 Recipient address rejected: Access denied" for one user - Exchange Office 365 Hybrid - TechLabs](https://techlabs.blog/images/easyblog_articles/88/b2ap3_large_550-5.4.1-recipient-address-rejected.png)
Solution: NDR Error "550 5.4.1 Recipient address rejected: Access denied" for one user - Exchange Office 365 Hybrid - TechLabs
![Non-Delivery Report: [550 5.4.1 Recipient address rejected: Access denied] – Exclaimer Cloud Knowledge Base Non-Delivery Report: [550 5.4.1 Recipient address rejected: Access denied] – Exclaimer Cloud Knowledge Base](https://exclaimerkbimages.blob.core.windows.net/images/Exclaimer%20Cloud/New%20UI/MailRouting4.png)
Non-Delivery Report: [550 5.4.1 Recipient address rejected: Access denied] – Exclaimer Cloud Knowledge Base
![My mailserver cant accept emails error 454 4.7.1 email@domain.tld: Relay access denied - YouTube My mailserver cant accept emails error 454 4.7.1 email@domain.tld: Relay access denied - YouTube](https://i.ytimg.com/vi/AcgHzzwrsPU/maxresdefault.jpg)
My mailserver cant accept emails error 454 4.7.1 [email protected]: Relay access denied - YouTube
![My mailserver cant accept emails error 454 4.7.1 email@domain.tld: Relay access denied - YouTube My mailserver cant accept emails error 454 4.7.1 email@domain.tld: Relay access denied - YouTube](https://i.ytimg.com/vi/M_1wtffGd_Q/hqdefault.jpg?sqp=-oaymwE8CKgBEF5IWvKriqkDLwgBFQAAAAAYASUAAMhCPQCAokN4AfABAfgB_gmAAtAFigIMCAAQARh_IDEoKDAP&rs=AOn4CLCpyIovSOozpf4XCi6zgPbv3ZLM3A)