https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=33633 --- Comment #4 from David Cook <dcook@prosentient.com.au> --- (In reply to Christopher Brannon from comment #3)
(In reply to David Cook from comment #2)
There's no simple way to test the existence of an email address before actually trying to send an email.
There are sites that will test. Like https://email-checker.net/. It even seems to offer an API. Even if it isn't 100%, it could offer a way to say to staff, hey, something might be wrong here. Better verify. And then we can mark if it has been verified.
As I said before, there are entire software systems devoted to this, yes. If you look at the "How do we verify an email" section of https://email-checker.net/, you'll see that it's a multi-step process and not 100%. Koha already checks the email address format. Previously, we've talked a bit about checking the domain name and MX records, but it never went anywhere. As for simulating sending a message, that's more complex. Perhaps this is an area where a Koha plugin hook could be added.
However, perhaps there could be a better way of falling back to another method if one fails.
Also, Koha could include an "email_verified" column. Many systems will ask you to verify your email. That could be a worthwhile addition to Koha for sure.
Yes, I have actually filed another bug somewhere asking for that very thing. Maybe someday. :)
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