Do you have any error logs from your server? Or have you any option to see logs in outlook?
If it works sometimes and sometimes not it possible not a problem in your code but more in the server configuration. Maybe you can ask your provider.
Thank you for your response, unfortunately the laravel.log is emty, and I think the same, I think my code is not the problem, but I don't know where to see the configuration in my server outlook :(
I'm not familiar enough with server management to pinpoint you directly to the correct log files.
For that you need to have someone who managed your server and/or look at the configuration from your server mail software.
https://docs.aws.amazon.com/ses/latest/dg/troubleshoot-smtp.html , however this error may occur your sender verifications failed also. try to troubleshoot by sending the mail from shell and then re-check the code. if the sender's mail id is not recognized it may also fail to deliver.
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