In some topics the haveIbeenpwned (HIBP) website has been referred to. So I decided to give it’s own topic on this site.
HIBP is a site where you can check whether your details have been involved in data breaches (possibly false positives). You can search each email address you “own” and see if any sites show results. It isn’t a complete list of breaches for various reasons but it is a great start to addressing your security. When you find a site that appears to have lost control of your data you can at least take steps to change passwords, delete accounts if warranted and other actions as required.
You can also list your email address/es with the HIBP site so any future possible breaches involving your data can be notified to you as soon as possible.
The breach may not really have occurred for reasons as explained on the site (https://haveibeenpwned.com/FAQs#SpamList) but when your email address appears as pawned it is because it has been found in the lists, spam lists, & pastes provided on various sites by the “culprits”. The HIBP site then generates an email to you explaining which site potentially lost control of it’s data. You can’t always find or see your raw data if included in a paste as pastes can be very transient, nor does HIBP store pastes.
As explained in the FAQs (https://haveibeenpwned.com/FAQs#SpamList) some usage of your email address/es may not mean a breach but forewarned is fore-armed.
Also If you don’t recognise a site: