Yes (thank you for clarifying this point for others), the first mail is sent a month before expiration, and the certs are renewable after a month. So with a we

Yes (thank you for clarifying this point for others), the first mail is sent a month before expiration, and the certs are renewable after a month. So with a weekly cron (for example) you should never get any mail from LE. That's why I meant. Thanks again.