Hxcore.ol Instant

: Systems use these IDs to group messages together in your inbox. If the ID changes or is formatted incorrectly, it can sometimes cause threads to break, leading to fragmented conversations. Technical Implications for Admins

Are you seeing in your server logs or a specific email header ? Gmail assigning Message-IDs with two different domains hxcore.ol

Every email contains "hidden" metadata known as email headers . These headers act like a passport, recording every server the email passed through. Message-ID Generation : Systems use these IDs to group messages