Symfony version(s) affected

6.1.0

Description

I'm experiencing a strange behavior when trying to send transactionnal e-mails.

I use symfony/mailer 6.1.* & symfony/sendinblue-mailer 6.1.*, I configured sendinblue+api transport.

Some of my transationnal e-mails throw this fatal error:

Fatal error: escapeshellarg(): Argument exceeds the allowed length of 8192 bytes in C:\www\deposit\vendor\symfony\http-client\DataCollector\HttpClientDataCollector.php on line 194

When using another transport (e.g. smtp, sendmail), I don't have this error. It seems normal as HTTPClient are not involved in these cases.

My email is 28.7KB weight.

It's look like it's a BC break of Symfony 6.1 as https://github.com/symfony/http-client/blob/6.1/DataCollector/HttpClientDataCollector.php changed to introduce usage of escapeshellarg. I understand it's more secure, but it introduces limitation to send e-mails through API.

How to reproduce

Send a large e-mail with an API transport, e.g. sendinblue.

Possible Solution

As workarround, it's possible to use 3rd-party-provider+smtp instead of 3rd-party-provider+api transport (but with loss of functionnalities, for instance tags).

Additional Context

Found out that

php -r "escapeshellarg(str_repeat('a', 8000));" does not throw the error.

php -r "escapeshellarg(str_repeat('a', 9000));" throws the error.