Sender is not allowed to send from outlook.com

Replies: 0

Hi,

I’m using WP Mail SMTP with an Outlook account. The test email sends correctly and I’m able to send myself an email with no errors. But, sometimes I get this error message when I’m assuming someone else with an Outlook account tries to contact me.

Email Source: WPForms Lite
Mailer: Other SMTP
SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: Sender is not allowed to send from outlook.com (R2)
SMTP code: 550 Additional SMTP info: 5.1.0

I’ve tried to fix it myself but do keep getting this same error code every now and then.

Any help would be much appreciated!