I know that this is not the best thread title, but lines of text in different pages are converted into hyperlinks to subeta.net/mail.php. It's hampering the ability to search for items in shops manually, as even the "Search" button links to the inbox when clicked (or even hovered!) Clicking on the searchbar to activate it does the same thing. I suspect that there's an improperly closed link somewhere.
Here are examples of the problem. Notice the URL on the bottom-left on hover. https://imgur.com/HQTOe7h https://imgur.com/TgVr3Ke https://imgur.com/mjvuGg4
I've encountered this issue on every page with "heading text" on the body. I would try to change my theme to something that isn't the Luminaire theme, but even the drop-down box redirects me to the inbox.
Have you tried deleting your old sMail events? I know there was an issue after the sCode processor was updated, old sMail events had some broken code in them that caused the whole page to link to the sMail page. Deleting the events fixed the issue.