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RSS Every 10 minutes server error on mail send via cron: "Unable to write bytes on the wire"

Thread starter nocte
Start date Mar 12, 2026

nocte

Guest

Guest or Bot

Mar 12, 2026

Since the upgrade from 2.3.7 to 2.3.10 we get this error roughly every 10 minutes (i.e. minute 0, 10, 20, 30, 40, 50) once:

Code:

Code:

Symfony\Component\Mailer\Exception\TransportException: Email to ****gmail.com from ***@forum.tld failed: Unable to write bytes on the wire. src/vendor/symfony/mailer/Transport/Smtp/Stream/AbstractStream.php:47
Generated by: Unknown account 12.3.2026 at 16:50
Stack trace
#0 src/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php(180)...

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RSS Every 10 minutes server error on mail send via cron: "Unable to write bytes on the wire"

nocte

Guest

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