some tickets go automatically to spam mailbox

some tickets go automatically to spam mailbox

Hi, i don't why but some tickets goes to SPAM mailbox or non desire (i have in spanish translation).

As a result, if i search this tickets even with the ticket number it doesn't appear. By chance y see it in this folder.

To questions about it. Why this tickets are in spam mailbox and how can i move it in order to be searched??

Regards