Confirmation and Recover password mails not working

Hi I have Sentry 9 and I configured the config.yml file to use the SES credentials for send mails.
For notifications mails it is working however it is works sometimes for Confirmation mails and never for recovery passwords. I’m not sure what might be the issue, since it is sending mails but not all, even I’m not seeing any error in the docker logs.
Thanks in advance