An uptick of bots signing up

[jannis]

Might be worth having a look here:

Ghost sign up and spam?

Hey, I am self hosting Ghost and also my email with mailcow. The last couple of days I got a couple of weird sign ups: [Screenshot 2025-01-20 at 22.28.00] And my mail server is going crazy with messages like this: Your message could not be delivered for more than 4 hour(s). It will be retried until it is 5 day(s) old. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. …

There is a new configuration option in Ghost, that was rolled out with v5.107.1 yesterday, which can help with this. Depending on where you host your site, you might want to reach out to them to see when/how that option will be supported.