I have a Gmail thread ID, and I want to forward the entire email chain along with all attachments to another email address. What gmail apis or code do I need to follow to accomplish this?

I am leveraging Gmail push notification (using StreamingPull) to see if we can keep a near real-time sync with the User’s Gmail inbox.
Occasionally, I see a big gap between updates for some users. For example, my system retrieved pub/sub message (update) for user A with history ID = 10_000, and we don’t see any pub/sub messages for User A until like 30 minutes later with history ID = 10_500, and there were a number of updates in between that happened within that 30 minutes window. But, for some reasons, it doesn’t look like those updates were published to Gmail pub/sub that I am subscribed to.

I am leveraging Gmail push notification (using StreamingPull) to see if we can keep a near real-time sync with the User’s Gmail inbox.
Occasionally, I see a big gap between updates for some users. For example, my system retrieved pub/sub message (update) for user A with history ID = 10_000, and we don’t see any pub/sub messages for User A until like 30 minutes later with history ID = 10_500, and there were a number of updates in between that happened within that 30 minutes window. But, for some reasons, it doesn’t look like those updates were published to Gmail pub/sub that I am subscribed to.

We’re looking for APIs and code for the bulk signature upload in Gmail. One signature is for new emails and one is for forwarding and reply emails.

I am a google workspace administrator, and we use gmail for our domain. I have a server-side application that sends out email as a specific gmail user, say “[email protected]”. This application uses username and password as the required credentials for sending mail through gmail.

content://com.google.android.gm.sapi/[email protected]/message_attachment_external/%23thread-f%3A1800571134366024683/%23msg-f%3A1800571134366024683/0.1?account_type=com.google&mimeType=text%2Fhtml&rendition=1

I’m a commodity trader (the non-technical side of this project) that built a web application that delivers auto-formatted and tailored product offerings to customers based on inventory scattered across the Eastern US. Im wondering if I can populate all the ‘Draft’ emails from my application into a table in my app and use the Gmail API to send one-by-one by pressing ‘Enter’ in quick succession and not have to worry about deliverability issues? When using an Email API provider they require an ‘Unsubscribe’ button and other rules as per Acceptable Use Policy. My customer base is about 500 people so Id rather sit at my desk and press ‘Enter’ 500x in quick succession rather than send in bulk via Email API with all the rules that basically show my hand that the offerings are automated to customers (would prefer it to look like I did it one-by-one).

Want to use this feature but not able to get a hold of anyone who can help me with permissions to use this feature. And without permission I am only able to get the text meta data and images are missing when promotional email sent out.