Hello,
I believe the person (gloryaec) who posted on this question used the respond by email feature. It looks like it carried over the footer of the email as well:
https://publiclab.org/questions/stevie/12-16-2019/are-there-simple-tests-for-nitrates-in-well-water
Screenshot here! Stevie is right!

We have a whole system to detect quoted text from emails; it's here:
However it looks like it failed on this message. I recovered the email and we should test it against the filter in comment.rb:
https://gist.github.com/jywarren/16f976c8bef0b1d22ba44484c8758e25
We could test it manually in https://rubular.com/ and figure out what went wrong, and adjust the filter?
Published
Hi great! I just tried to reply by email to test this out. I was replying to a comment on a research note and it didn't go thorough. Perhaps this is a different issue. This is what it looked like on my email:

It didn't show up on this research note: https://publiclab.org/notes/nshapiro/09-26-2016/build-a-plant-based-air-purifier#comments
I think this may have been published on the GCI task dashboard but not yet taken up or solved. Perhaps @Uzay-G or @VladimirMikulic may be interested in it, if there is any time left, or we can boost it another way!
Ah and yes, I think you have ID'ed another issue about it not posting at all, and will post that. Can you forward me both emails so I can collect all relevant info just in case? Thanks!
Posted it here! https://github.com/publiclab/plots2/issues/7321 Thank you!!!
I think this may have been published on the GCI task dashboard but not yet taken up or solved. Perhaps @Uzay-G or @VladimirMikulic may be interested in it, if there is any time left, or we can boost it another way!
I will investigate to try and debug the error :+1:
Testing the comment filter on the gist you provided fails.
Are we able to add a new filter step that scrubs the content in our own comment emails? Perhaps, looking for standard text from one or all of these templates? https://github.com/publiclab/plots2/tree/master/app/views/comment_mailer
Yeah that could work. But maybe could you explain what the .+ in the regex does? I understand the grouping of the results but the use of .+ confuses me. Thanks!