You're asking about how 'good' a specific question will be perceived. That's not a question on how to use a website in a specific function.
if you'd asked "How do I ask a question or how do I create a poll on reddit" - then it's on-topic.
Furthermore you state
Please give an example to prove your point.
which is an further invitation to request for ...
I put the question on hold. Please see the Help, but specifically:
Don't ask about...
Creating or developing a web application
Your other question was marginally okay, because it was asking about how to use the web interface of a particular feature, but a general question about something solely related to writing web applications is ...
It's actually not that bad - here're some stats;
193 migrations in the last 90 days
superuser.com → webapps.stackexchange.com × 97; 16% rejected
programmers.stackexchange.com → webapps.stackexchange.com × 2
From Meta Stack Exchange:
Starting [December 10, 2016], these should be deleted automatically 30 days after being rejected.
Note that this logic will only delete a rejected, migrated question if it meets the following criteria:
Migrated from another site (and no moderator has cleared the migration history)
Not already deleted
Closed (but not as a duplicate)...
At first glance I would say Super User, however, you are suspended on Super User at the moment so the migration of the question would have have been automatically blocked.
Please don't post off topic questions on other sites try and circumvent a question ban or suspension on another site. Such behaviour can lead to a wider and/or longer suspension.
On a ...
The guidelines for the site's scope have not changed in the intervening time. Please see Make all recommendation questions out of scope and off topic, regardless of research as to why questions asking to recommend a website are off-topic, regardless of whether you included which sites you have tried already.
As was also mentioned in comments on the ...
It should not be re-opened as nowadays it's an off-topic question, actually it already has 2 delete votes. If it receive one more, it will be deleted.
IMHO the best way to proceed is to post a similar question on Software Recomendations.
Related Meta Q&A
Should we apply an historical lock to "Alternative to Facebook"?
Related Help Articles
The close reason used by the moderator who cast the binding vote was:
I'm voting to close this question as off-topic because the issue could not be reproduced as of 9/8/2017.
Google-docs shared link requires login to edit document
The term "off topic" is used as a general catch all and perhaps should be replaced by "out of scope" (but I'm sure that will ...
How to download this webpage? is now closed.
Bearing in mind that this was over 5 years ago now, it's safe to say that the question likely fell through the cracks or was considered to be on the borderline at that point.
Our site has certainly evolved drastically from what it once was, so there is going to be this type of situation now and again. Overall,...
Generally, if both questions have answers, we want the "master" to be the better question with the better answers. The date shouldn't matter.
In this particular case, I think it's pretty much a toss-up. I think the question marked as a duplicate has a little more detail, but I think the accepted answer on the "master" is better.
Since the purpose of ...
I asked in the comment -
Are you talking about outlook.com or the desktop email client outlook? - Sathya
To which you replied:
@Sathya email client - vignesh4303
Per the first point of the FAQ that you have quoted:
Please note that the following subjects are considered off-topic here:
and hence was closed as so.
Consider yourself lucky, you've gotten two nice answers !!
answer given, as per comment, directs to a massively voted Q&A on Stack Overflow.
answer re-directs to a Wiki-page, about how to build an email address with the proper syntax.
This almost indicates that the information you're looking for is rather quickly obtainable or users have a hunch that ...
Asking for app recommendations is no longer on-topic on this site, and hasn't been for some time.
If you are looking for a recommendation for a web application, and not a web site, then Software Recommendations is the place to go. Do be sure to read their Help Center, though, because they have stringent requirements for questions.
Tl;Dr: Webmail apps that were retired like Google Inbox are off-topic, those that are available are on-topic.
The comments on the referred the question include some hints about what happened in this specific case:
Inbox by Gmail was retired in April, 2019 and is no longer available.
I think that this text was added as a custom close reason, then some "...
Yes, the referred question is off-topic on this site.
While nowadays it's very common that popular "web applications" have a mobile app, this site's scope doesn't encompasses all the front-ends, it's only about using such web applications.
Even on applications like Instagram, WhatsApp and other software as services which their main functionality is ...
Your question should really have been asked on Maths meta as it concerns that site. While we are here to help you with questions about websites, questions about other sites on the Stack Exchange network are effectively off topic as we have dedicated sites (the meta sites) for each main site.
Rather than migrate it there though it's probably best if you ...
We also used to have a custom canned response for "dead" web apps
Questions on applications or application features that are no longer available are off-topic for Web Applications as no one will ever be able to make use of the answers again.
that was replaced recently.
(Oddly, I don't recall seeing any conversation here about changing the canned custom ...
The question quite clearly, to me, was
"Does gmail/hotmail have any special rules about email addresses?"
and the answer should have been
"No, they follow the standard rules for email addresses that everyone* follows.
*most everyone, I'm sure there's an exception or two out there"
I do think a young site like this should be careful about how eager it is ...
I answered your original question which shows that there is a misunderstanding on how tags work (threads cannot be tagged only the messages within via manual process or filters), thus invalidating your second question.
The question remains as a duplicate subset question of your original question.
Essentially what you're asking for are suggestions for app replacements.
These type of questions fall better on sites geared for that such as Slant and AlternativeTo.net.
As a general test, if your question would be perfectly in line with either of these two sites, it's most likely not constructive and ill-fit for a Stack Exchange site.
ChrisF nicely explains why it was off-topic (not about a web app, but a protocol).
For a little more help on what could have been done to get the question re-opened, though (to fully answer your question), you could have:
asked what characters should be used in e-mail addresses if they are to be handled by [insert webmail service here (GMail, Outlook, etc.)...
In both questions you even refer to the bug you submitted to Google. Here is a suggestion: Take the first question and offer a bounty.
Several people have tried to duplicate the error you are seeing. Unfortunately we have struck out.