If error occurs on sending email for double optin, "Oops an error occurred" is displayed (instead of flash message)

[sypets]

I tested this with a wrong not existing email and also a wrongly configured email configuration with same results.

I expect a flash message to appear, not an exception. If the email fails in the next stage (e.g. mail to receiver) it does not throw exception, but shows a flash message theoretically (if not for #1108, #1087 etc - which I did not check now, if still reprodible).

This behaviour is inconsistent.

Also, I think this is new and previously this "seemed" to work and a confirmation messages was displayed (which is also not right).

Reproduce

1. Create working form with double-optin and an email field

2. In the frontend, fill out not existing email and submit form

Expected: Flash message with error message

Actual result:

Oops, an error occurred! Code: 202408291448112ee11570

Versions

• TYPO3 : latest 12.4 branch (from git)
• powermail: lastest master branch (shows version 12.4.0)

Additional context

I installed with latest master and without additional extensions to rule out side effects, so it is simple configuration with defaults.

I am on a system where I immediately get error if mail fails (configured via SMTP). This is not always the case, see Avoid sending bounces from your server, so depending on email configuration, a bounce email might be sent instead and the user sees no error at all.

Exception

Thu, 29 Aug 2024 16:30:31 +0200 [ALERT] request="9f13f63495e73" component="TYPO3.CMS.Frontend.ContentObject.Exception.ProductionExceptionHandler":
 Oops, an error occurred! Code: 202408291630305b25c4b1- UnexpectedResponseException: 
Expected response code "250/251/252" but got code "550", with message "550 5.1.1 
<fehlerhafte-email@******>... User unknown"., 
in file /var/www/t3coredev12/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php:333 - 
{"exception":"Symfony\\Component\\Mailer\\Exception\\UnexpectedResponseException: Expected response code \"250/251/252\" but got code \"550\", with message \"550 5.1.1 <fehlerhafte-email@uol.de>... User unknown\". in /var/www/t3coredev12/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php:333

Stack trace:

#0 /var/www/t3coredev12x/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(201): Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport->assertResponseCode()
#1 /var/www/t3coredev12x/vendor/symfony/mailer/Transport/Smtp/EsmtpTransport.php(117): Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport->executeCommand()
#2 /var/www/t3coredev12x/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(259): Symfony\\Component\\Mailer\\Transport\\Smtp\\EsmtpTransport->executeCommand()
#3 /var/www/t3coredev12x/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(218): Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport->doMailFromCommand()
#4 /var/www/t3coredev12x/vendor/symfony/mailer/Transport/AbstractTransport.php(90): Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport->doSend()
#5 /var/www/t3coredev12x/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(137): Symfony\\Component\\Mailer\\Transport\\AbstractTransport->send()
#6 /var/www/t3coredev12x/typo3/sysext/core/Classes/Mail/Mailer.php(111): Symfony\\Component\\Mailer\\Transport\\Smtp\\SmtpTransport->send()
#7 /var/www/t3coredev12x/typo3/sysext/core/Classes/Mail/MailMessage.php(54): TYPO3\\CMS\\Core\\Mail\\Mailer->send()
#8 /var/www/t3coredev12x/typo3conf/ext/powermail/Classes/Domain/Service/Mail/SendMailService.php(148): TYPO3\\CMS\\Core\\Mail\\MailMessage->send()
#9 /var/www/t3coredev12x/typo3conf/ext/powermail/Classes/Domain/Service/Mail/SendMailService.php(107): In2code\\Powermail\\Domain\\Service\\Mail\\SendMailService->prepareAndSend()
#10 /var/www/t3coredev12x/typo3conf/ext/powermail/Classes/Domain/Service/Mail/SendOptinConfirmationMailPreflight.php(83): In2code\\Powermail\\Domain\\Service\\Mail\\SendMailService->sendMail()
#11 /var/www/t3coredev12x/typo3conf/ext/powermail/Classes/Controller/FormController.php(337): In2code\\Powermail\\Domain\\Service\\Mail\\SendOptinConfirmationMailPreflight->sendOptinConfirmationMail()
#12 /var/www/t3coredev12x/typo3/sysext/extbase/Classes/Mvc/Controller/ActionController.php(479): In2code\\Powermail\\Controller\\FormController->createAction()
....

stack_trace_powermail_email.txt