Plugin Author
Bowo
(@qriouslad)
@matchelo3 in the Email Delivery module, please click on “Enable debug mode and output the debug info into WordPress debug.log file.” checkbox. Then, install the Debug Log Manager plugin and toggle on / enable error logging there. Then, send another test email in Email Delivery module. The detail of the error should be shown in the Debug Log Manager dashboard. Please send a screenshot of it.
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This reply was modified 6 months, 2 weeks ago by
Bowo.
Plugin Author
Bowo
(@qriouslad)
@matchelo3 were you able to follow the instructions I provided in my previous reply?
I am encountering the exact same SMTP connection failure with this multi-feature plugin, despite the sender email address and the authentication username being identical and confirmed active on our server, which functions perfectly with dedicated SMTP plugins. The detailed error log consistently shows the server rejecting the submission with the code 553 5.7.1 : Sender address rejected: not owned by user [Authentication User], strongly indicating a code implementation bug within this specific plugin.
The issue appears to be how the plugin handles the SMTP authentication or how it sets the FROM header, failing to satisfy the server’s security requirement that the sender address must precisely match the authenticated user. It started happening on new versions of the plugin, I used to used it normaly before.
Follow the logs.
1OutroErro SMTP: Os seguintes destinatários falharam: [email protected]: : Sender address rejected: not owned by user [email protected] 6, 2025 – 15:30:26
(1 ocorrência registrada)2OutroConnection: closeddez 6, 2025 – 15:30:26
(1 ocorrência registrada)3OutroSERVER -> CLIENT: 221 2.0.0 Byedez 6, 2025 – 15:30:26
(1 ocorrência registrada)4OutroSMTP INBOUND: “221 2.0.0 Bye”dez 6, 2025 – 15:30:26
(1 ocorrência registrada)5OutroCLIENT -> SERVER: QUITdez 6, 2025 – 15:30:25
(1 ocorrência registrada)6OutroSMTP ERROR: RCPT TO command failed: 553 5.7.1 : Sender address rejected: not owned by user [email protected] 6, 2025 – 15:30:25
(1 ocorrência registrada)7OutroSERVER -> CLIENT: 553 5.7.1 : Sender address rejected: not owned by user [email protected] 6, 2025 – 15:30:25
(1 ocorrência registrada)8OutroSMTP INBOUND: “553 5.7.1 : Sender address rejected: not owned by user [email protected]”dez 6, 2025 – 15:30:25
(1 ocorrência registrada)9OutroCLIENT -> SERVER: RCPT TO:dez 6, 2025 – 15:30:25
(1 ocorrência registrada)10OutroSERVER -> CLIENT: 250 2.1.0 Ok
Plugin Author
Bowo
(@qriouslad)
