Error 500 when sending example email with recreated recipient

[KrGaj]

Mautic Series

5.2.x series

Mautic installed version

5.2.1

Way of installing

I cloned the Mautic repo (not recommended or supported)

PHP version

8.2

What browsers are you seeing the problem on?

Not relevant

What happened?

When trying to send example email with recreated recipient field, an error 500 occurs. I found that removing existing recipient from the list and creating the new one causes that the example_send[email][list] field has unset elements. For example, with one recipient without any changes, their email will be sent in example_send[email][list][0], but when that field removed and created again, it will be in example_send[email][list][1].

How can we reproduce this issue?

Step 1: On 'Emails' page, select some email channel
Step 2: Click the dropdown icon, and then select 'Send Example'
Step 3: Remove existing recipient from 'Recipients' list
Step 4: Click 'Add recipient'
Step 5: On the new field, type desired email address
Step 6: Click 'Send' button

Relevant log output

[2025-01-14T10:30:25.706423+00:00] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\Mime\Exception\RfcComplianceException: "Email "1" does not comply with addr-spec of RFC 2822." at /home/www/mautic/www/vendor/symfony/mime/Address.php line 56 {"exception":"[object] (Symfony\\Component\\Mime\\Exception\\RfcComplianceException(code: 0): Email \"1\" does not comply with addr-spec of RFC 2822. at /home/www/mautic/www/vendor/symfony/mime/Address.php:56)"} {"hostname":"mautic.local","pid":5301}

Code of Conduct

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