One-Page Checkout [Support Thread]

opc 2.7.0. zc 2.1.0. php 8.2

I just received the following warning file. Not sure if it is related to OPC or not. First time to receive this warning.

[07-Oct-2026 18:51:35 America/New_York] ERROR: Failed sending email to: "Guest Customer, **do not remove**" <> with subject: "example.com - New Password" (failed validation)

njcyx:

opc 2.7.0. zc 2.1.0. php 8.2

I just received the following warning file. Not sure if it is related to OPC or not. First time to receive this warning.

[07-Oct-2026 18:51:35 America/New_York] ERROR: Failed sending email to: "Guest Customer, **do not remove**" <> with subject: "example.com - New Password" (failed validation)

That's not the full log; from which page (admin vs. storefront) was the log issued?

Yeah, I don't know why the log is not completed. But that is all the info I have. I will report if it happens again.

I believed it is from the storefront, not the admin page.

Oh, it's probably coming from PHPMailer ... not that that helps.

lat9:

Oh, it's probably coming from PHPMailer ... not that that helps.

Actually, it's coming from the zen_mail function in /includes/functions/functions_email.php (for zc210). Find line 115 of that file

error_log(sprintf(EMAIL_SEND_FAILED . ' (failed validation)', $to_name, $to_email_address, $email_subject));

and change that to

trigger_error(sprintf(EMAIL_SEND_FAILED . ' (failed validation)', $to_name, $to_email_address, $email_subject));

that'll create a "real" log record, showing where the email originated.

Thank you as always. I will give it a shot.

If you don't mind, can you please help me to delete my domain name in post #3081 and #3082? I forgot to delete it when I submit the post. Sorry for the inconvenience.

njcyx:

Thank you as always. I will give it a shot.

If you don't mind, can you please help me to delete my domain name in post #3081 and #3082? I forgot to delete it when I submit the post. Sorry for the inconvenience.

Done

Thank you so much. I have updated functions_email.php per your instruction and I will let you know if we receive any new log files.

We received lots of DDoS attack recently. I'm not sure if it is related.