Some of my mail is handled by a third party. Every email I send using that party has a Blind Carbon Copies (BCC) to myself @ my third party's email address. All mail at the third party is forwarded to my Gmail account.
So I'm not using Gmail to send any message. And Gmail is just receiving forwarded messages including the BCCs.
The BCC messages appear in Gmail, however, they have no label at all (also no INBOX label). These BCC messages can only be viewed in Gmail's forlders All Mail and Sent Mail. This only happens with mail sent from my iPhone. When sending mail from my windows PC using Thunderbird, every BCC message gets an INBOX label only, it does not appear in Gmail's Sent folder.
I don't use skip inbox. Conversation View is OFF. I have tried filters like BCC:xxx and deliveredto:email@example.com , even regular ones like to:xxx or from:xxx . No filter works on those BCC messages, it looks like they are automatically archived. The problem is that I cannot download those BCCs either (as a check that they have been sent).
Any suggestion how I can get those messages labeled and/or download them to my iPhone using IMAP?