I can’t find anywhere in Discourse admin panel where I can find full details of bounced emails – to read the content and find out the bouncing reason.
I don’t seem to have those saved in my email account (automatically deleted by Discourse?)
Bounces for mail attempting to be delivered to Discourse, or bounces for mail sent by Discourse? In either event, they’re under Admin -> Emails, just different tabs (“Rejected” vs “Bounced”).
Yep, they’re listed there, but I’m interested in full email details to analyse the bounce reasons.
Look in siteurl/logs
There is a warning message for each bounce (incoming and outgoing), starting with “Email can not be processed:…” you can see the details in “info”.
siteurl/admin/email/bounced lists destination and type of bounced,
siteurl/admin/email/rejected lists source, subject and reason.
So click on the link under the “error” column. It’ll display a pop up with everything you could ever possibly want to know about the bounce.
Found out that you also have to enable log mail processing failures in settings.
You might also want to know that discourse is reporting greylisted emails as bounced:
もし私が当初そうだったように、他の皆さんも混乱されている場合は、「error」列は実際には「Email Type」と呼ばれています。そのため、私は表内の他のリンクや表の項目自体をクリックしてここへ来ました。しかし、それらのいずれも望む動作をしませんでした。「digest」や「mailing_list」を「Email Type」列でクリックしてエラー情報を取得するという発想に至らなかったのです。