Symfony\Component\Mailer\Exception\TransportException after upgrading to 11.35.0

[laserhybiz]

Laravel Version

11.35.0

PHP Version

8.3.13

Database Driver & Version

No response

Description

After upgrading to 11.35.0 in two projects I get these errors when trying to send a mail

Connection could not be established with host \"ssl://smtp.resend.com:587\": stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:\nerror:0A00010B:SSL routines::wrong version number

Connection could not be established with host \"ssl://smtp.gmail.com:587\": stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:\nerror:1408F10B:SSL routines:ssl3_get_record:wrong version number

Steps To Reproduce

Set .env mail variables to

MAIL_MAILER=smtp
MAIL_PORT=587
MAIL_ENCRYPTION=tls

and send a mail

[laserhybiz]

Looks like this is caused by #53749

[crynobone]

Can you test it with

MAIL_ENCRYPTION=(null)

Symfony Mailer has removed support for encryption in version 4.4 but we still have these options from swiftmailer era.

[laserhybiz]

@crynobone it does work fine when I set MAIL_ENCRYPTION to null.
I still think this should be considered as a BC since by just updating the minor version the current functionality breaks.

[laserhybiz]

and the encryption option is still in the skeleton

[crynobone]

Either way, keeping MAIL_ENCRYPTION=(null) should solve your project right now.