Reply To: Fatal error: Uncaught. Is it the form or the 365 server?

Thank you very much.
Here it is:
[22-Apr-2026 18:32:46 UTC] Connection: opening to smtp.office365.com:587, timeout=300, options=array (
‘ssl’ =>
array (
‘cafile’ => ‘/home/XXXXXXXX/public_html/quform/vendor/composer/ca-bundle/src/../res/cacert.pem’,
),
)
[22-Apr-2026 18:32:46 UTC] Connection: opened
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “220 YT4PR01CA0473.outlook.office365.com Microsoft ESMTP MAIL Service ready at Wed, 22 Apr 2026 18:32:46 +0000 [08DE9DB652951421]”
[22-Apr-2026 18:32:46 UTC] SERVER -> CLIENT: 220 YT4PR01CA0473.outlook.office365.com Microsoft ESMTP MAIL Service ready at Wed, 22 Apr 2026 18:32:46 +0000 [08DE9DB652951421]

[22-Apr-2026 18:32:46 UTC] CLIENT -> SERVER: EHLO riopel.com

[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-YT4PR01CA0473.outlook.office365.com Hello [2605:6f00:1234:700:1::110]”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-SIZE 157286400”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-PIPELINING”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-DSN”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-ENHANCEDSTATUSCODES”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-STARTTLS”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-8BITMIME”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-BINARYMIME”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-CHUNKING”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250 SMTPUTF8”
[22-Apr-2026 18:32:46 UTC] SERVER -> CLIENT: 250-YT4PR01CA0473.outlook.office365.com Hello [2605:6f00:1234:700:1::110]
250-SIZE 157286400
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250 SMTPUTF8

[22-Apr-2026 18:32:46 UTC] CLIENT -> SERVER: STARTTLS

[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “220 2.0.0 SMTP server ready”
[22-Apr-2026 18:32:46 UTC] SERVER -> CLIENT: 220 2.0.0 SMTP server ready

[22-Apr-2026 18:32:46 UTC] CLIENT -> SERVER: EHLO riopel.com

[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-YT4PR01CA0473.outlook.office365.com Hello [2605:6f00:1234:700:1::110]”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-SIZE 157286400”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-PIPELINING”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-DSN”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-ENHANCEDSTATUSCODES”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-AUTH LOGIN XOAUTH2”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-8BITMIME”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-BINARYMIME”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250-CHUNKING”
[22-Apr-2026 18:32:46 UTC] SMTP INBOUND: “250 SMTPUTF8”
[22-Apr-2026 18:32:46 UTC] SERVER -> CLIENT: 250-YT4PR01CA0473.outlook.office365.com Hello [2605:6f00:1234:700:1::110]
250-SIZE 157286400
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-AUTH LOGIN XOAUTH2
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250 SMTPUTF8

[22-Apr-2026 18:32:46 UTC] Auth method requested: XOAUTH2
[22-Apr-2026 18:32:46 UTC] Auth methods available on the server: LOGIN,XOAUTH2
[22-Apr-2026 18:32:47 UTC] CLIENT -> SERVER: AUTH XOAUTH2

[22-Apr-2026 18:32:47 UTC] SMTP INBOUND: “334”
[22-Apr-2026 18:32:47 UTC] SERVER -> CLIENT: 334

[22-Apr-2026 18:32:47 UTC] CLIENT -> SERVER: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXETC.

[22-Apr-2026 18:32:52 UTC] SMTP INBOUND: “535 5.7.3 Authentication unsuccessful [YT4PR01CA0473.CANPRD01.PROD.OUTLOOK.COM 2026-04-22T18:32:52.586Z 08DE9DB652951421]”
[22-Apr-2026 18:32:52 UTC] SERVER -> CLIENT: 535 5.7.3 Authentication unsuccessful [YT4PR01CA0473.CANPRD01.PROD.OUTLOOK.COM 2026-04-22T18:32:52.586Z 08DE9DB652951421]

[22-Apr-2026 18:32:52 UTC] SMTP ERROR: OAuth TOKEN command failed: 535 5.7.3 Authentication unsuccessful [YT4PR01CA0473.CANPRD01.PROD.OUTLOOK.COM 2026-04-22T18:32:52.586Z 08DE9DB652951421]

[22-Apr-2026 18:32:52 UTC] SMTP Error: Could not authenticate.
[22-Apr-2026 18:32:52 UTC] CLIENT -> SERVER: QUIT

[22-Apr-2026 18:32:52 UTC] SMTP INBOUND: “221 2.0.0 Service closing transmission channel”
[22-Apr-2026 18:32:52 UTC] SERVER -> CLIENT: 221 2.0.0 Service closing transmission channel

[22-Apr-2026 18:32:52 UTC] Connection: closed
[22-Apr-2026 18:32:52 UTC] SMTP Error: Could not authenticate.
[22-Apr-2026 18:32:52 UTC] PHP Fatal error: Uncaught PHPMailer\PHPMailer\Exception: SMTP Error: Could not authenticate. in /home/XXXXXXXX/public_html/quform/vendor/phpmailer/phpmailer/src/PHPMailer.php:2384
Stack trace:
#0 /home/XXXXXXXX/public_html/quform/vendor/phpmailer/phpmailer/src/PHPMailer.php(2175): PHPMailer\PHPMailer\PHPMailer->smtpConnect()
#1 /home/XXXXXXXX/public_html/quform/vendor/phpmailer/phpmailer/src/PHPMailer.php(1798): PHPMailer\PHPMailer\PHPMailer->smtpSend()
#2 /home/XXXXXXXX/public_html/quform/vendor/phpmailer/phpmailer/src/PHPMailer.php(1615): PHPMailer\PHPMailer\PHPMailer->postSend()
#3 /home/XXXXXXXX/public_html/quform/process-file-uploads.php(456): PHPMailer\PHPMailer\PHPMailer->send()
#4 /home/XXXXXXXX/public_html/quform/process-file-uploads.php(537): process()
#5 {main}
thrown in /home/XXXXXXXX/public_html/quform/vendor/phpmailer/phpmailer/src/PHPMailer.php on line 2384