Version 1.6.2-dev5.7 - "work in progress", Google Play "beta"

[Zduke]

Re: I have messages in my inbox that satisfy that criteria

Do they satisfy the criteria?
Are the numbers exactly the same, and all the rest, are the subjects exactly the same?
What StR asked above (indirectly)?

Sure, subjects are exactly the same and as I said thats why win10 mail client groups messages with this subject.

[Kostya Vasilyev]

Re: Sure, subjects are exactly the same

And they come from same exact address?

Did you enable app settings -> conversations -> combine on sender + subject?

If not please do and then tap "reindex conversations" two items down.

PS - just checked how the app cleans up (removes any reply prefixes) on this exact subject, the example you gave above:

"ES [1] EventSentry::12105 by Email Critical Events"

It's left untouched, as expected, so the square brackets aren't meaningful here.

[Zduke]

100% sure - same sender and subject.
settings -> conversations -> combine on sender + subject enabled.
I've done reindexing several times - while disabling and enabling conversation options.
I can send screenshots if you want...

[Kostya Vasilyev]

Re: 100% sure - same sender and subject

Is the sender's email address also an account in the app?

If so -- your own messages are excluded from "group by subject + sender" logic, or else you'd get strange results with sent messages.

[Zduke]

Re: 100% sure - same sender and subject
Is the sender's email address also an account in the app?
If so -- your own messages are excluded from "group by subject + sender" logic, or else you'd get strange results with sent messages.

Thats it
Sender's address is also an account in the app.
As soon as I changed sender's email address in Eventsentry to something different, grouping  works as expected.

[Kostya Vasilyev]

Re: As soon as I changed sender's email address in Eventsentry to something different, grouping  works as expected.

Good

[Davey126]

Re: I would expect them to be grouped even if they have some square brackets in subject line

I would not unless there is some hidden identifier used to associate similar messages or there are well understood conventions where such characters might exist. Understand your comments and recognize some mail clients successfully navigate the grouping of similar, but not identical subject lines. Also seen them misfire when a bracket, prefix (eg "Fwd:"), letter case or some other attribute doesn't match the template. That leads to more requests to accommodate an endless list of special cases. Vicious cycle.

[Kostya Vasilyev]

Re: an endless list of special cases. Vicious cycle

Yes. And I'd rather avoid this...