Some years back my boss went on a business trip where he refused to say where he was going. But he sent a few emails during that trip, and on a whim I clicked on "show headers" in Outlook and saw they contained the IP address he sent the emails from. From those I found out which ISP owned the IP address and where the ISP was located. When he returned I asked him "how was <country>?" and he pretended to be surprised until I told him his emails betrayed him.
Point being, assume any email you send is public and can be used to dox you.
Some years back my boss went on a business trip where he refused to say where he was going. But he sent a few emails during that trip, and on a whim I clicked on "show headers" in Outlook and saw they contained the IP address he sent the emails from. From those I found out which ISP owned the IP address and where the ISP was located. When he returned I asked him "how was <country>?" and he pretended to be surprised until I told him his emails betrayed him.
Point being, assume any email you send is public and can be used to dox you.
Was it Thailand?