Expected response code 354 but got code "554", with message "554 5.5.1 Error: no valid recipients "

[Heather Feuerhelm]

I have been testing the support system trying to troubleshoot why I am not receiving the staff emails (I am the only staff) when a ticket is created or updated by the client. I can confirm that the client receives responses, but staff does not. When I check the emails tab under logs and click on the email that should have been sent, I see the following error message:

Expected response code 354 but got code "554", with message "554 5.5.1 Error: no valid recipients "

What is causing this error and how can I fix it?

[domaingood]

Are you using PHPMailer Or Any SMTP?

[Heather Feuerhelm]

I am using SMTP and when I test in mail settings it passes. Also, clients receive emails including invoices and support ticket autoresponses and staff replies. However, I (as the only staff) do not receive ANY staff-related emails at all!

 

[ChristopherB]

Are you assigned to the department? You should be by default but worth checking! 

[Heather Feuerhelm]

Yes, I am assigned to every department. I checked that as part of my troubleshooting. 

[Bud Manz]

Did you use None in the SMTP Security dropdown, by chance?  I get that error when I use none... 

[Heather Feuerhelm]

@Bud ManzNo, I never use none. However, I must have reconfigured something correctly because now I am receiving emails.

[Bud Manz]

Sounds good, glad you got it working ?