Google's Feedback-ID Header

[Mxyzptlk FishStix]

https://support.google.com/mail/answer/6254652

I see where you can add a custom header under the delivery server in the backend. I assume this following below is the correct way to implement this in MW.

Header name (X-Feedback-ID)
Header value ([CAMPAIGN_UID]:[SUBSCRIBER_UID]:WHATEVER15ORLESSCHARACTERNAMEICHOOSE)

Thanks.

Addendum: Added "X-" based on @twisted1919's suggestion.

 

[twisted1919]

I think custom headers have to start with the X- prefix in order to be accepted.
However, i'll add this header as part of the app core.

 

[Mxyzptlk FishStix]

Since we're talking about Google? Does MW pass " Cache-Control: no-cache, max-age=0" on tracking images since the accessing Gmail through the web and mobile interfaces caches the images?

 

[twisted1919]

@Mxyzptlk FishStix - Google caches all images, regardless from where you access them and regardless of headers. It's been a long discussion about this at that time, but for now we are all fine with the way gmail works.

 

[Mxyzptlk FishStix]

https://blog.movableink.com/real-time-content-and-re-open-tracking-return-to-gmail/

 

[twisted1919]

As the images are served directly from the server(don't go through PHP), you can as well .htaccess them with right expiration.

 

[Mxyzptlk FishStix]

Thanks!

 

[Brett]

Did the Feedback-ID get added? I tried to add a custom header for it but the colons get stripped out so can't use it

Header Tag / Value
Feedback-ID / [CAMPAIGN_UID]:[SUBSCRIBER_UID]:notify:mymta

 

[twisted1919]

@Brett - yes feedback id header is added but since that version of mailwizz containing it hasn't been released yet, you'll have to wait a bit more.