Regarding point 1: such spam emails can be generated very easily, sender forgery is unfortunately very simple. Therefore, I would not pay too much attention to it. If you are still unsure and you use your own domain for your e-mails, contact the support of your e-mail hosting – if necessary, they can secure your domain in this regard.
To point 2:
a) what kind of error message do you get?
b) The fact that you do not get any emails from WordPress can be due to the hosting if it has security settings in this regard. The support of your hosting can also tell you something about this. Alternatively, you would have to install an SMTP plugin with which WordPress can send emails via your email server.
Hi, threadi – thank you for replying. I think I resolved the email issue. But, the below wording is what I see when I am logged into my WordPress admin page. I cannot access any menu. Every menu gives me the “critical error” message: “There has been a critical error on this website. Please check your admin email inbox for instructions.”
But, I cannot access my admin email inbox because that, too, gives me an error message.
The reason for the error should be visible in the error log. You can find it in your hosting area. If necessary, the support of your hosting can help you.
Alternatively, you could also enable debugging in WordPress. How to do this is described here: https://wordpress.org/support/article/debugging-in-wordpress/ – also here the support of your hosting can help you if necessary to edit the file accordingly.
In both cases you should be able to see what the cause is in the logfile. Often it is a plugin. You can delete the directory of the guilty plugin via FTP. After that you should be able to access it again.
