Gmail is stacking different subject emails while my client wants only same subject should be stack. I did a lot of testing and found that subject starting from [text] are ignored.

whatever you put inside [ ] will be ignored if you starting a subject with there rackets. But if you put these at the end this will be considered as a new subject.

I tested with different subjects

  • Test subject
  • Test subject [email new]
  • Test subject [new email]
  • [new email] Test subject
  • [email new] Test subject


and found the below result.



Test subject , [new email] Test subject[email new] Test subject are stacked together.