SMTP Error Home › Forums › Newsletter Plugin Support › SMTP Error This topic has 1 reply, 2 voices, and was last updated 6 years, 2 months ago by mysalus. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts August 21, 2018 at 6:35 pm #115606 lildiabloParticipant When trying to add smtp server i get the following error: SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: Client does not have permissions to send as this sender SMTP code: 550 Additional SMTP info: 5.7.1 Any ideas? August 31, 2018 at 11:32 pm #117478 mysalusParticipant I have the same issue. So far not response to my ticket on this issue. Author Posts Check out our premium plans with priority support. Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In