Reply To: Catering for when users simply reply to emails
The problems with this are multiple. Emails to site go into a mailbox – emails and web are separate – eg you can host you email with a totally different supplier, so in essence there is no ‘web software’ to catch an incoming email. So firstly the mailbox would need to exist on a mail server somewhere.
Next you’d need software on the email to look at all incoming, read the mail, work out if this is a reply, and to what message, check the sender’s mailbox to work out which user it is, and then get this software to send to another programme within the website, which can then create the reply.
The ability for spam and people pretending to be a user are numerous.
Github is created by very clever people, who have I presume done all this, but there would be a lot of code in many languages to achieve.
If it is an issue, then I’d suggest you amend your sending email to omit the actual content – so something like – ‘a new reply has been received, click here to read’ so that people have to click the link and are on the site to see content to reply to.