If you’re on Drupal then you can do this with Views Integration -> here is a tutorial with steps and screenshots on how to create a downloadable Hogwarts Certificate:
How can Members download their own Membership Certificate/Card?
Instead of pulling in Membership data -> pull in Event/Participant data and status.
We've run into the same issue, and couldn't find any extension to solve it.
We could develop something like a 'recipients public' flag on the "Email - send now" action, that would allow the reply-all option to work in any email client.
Is anyone else interested in this development? Let us know...
I haven't found the cause, but I've found a fix that seems to work.
If I call up Edit on a contact and then Save it, even without making any changes, I am able to send that contact bulk email. I cannot be sure, but I suspect that the defective contact records were ones that were imported via CSV from another platform with an older CiviCRM release.
Yes, this ...
The reason it says that it says that there is no valid from address is: You need to click the default option when you set up the from email address. I have done that and it now works. However, when I send a test email it is sending it to a domain that I mistyped. Hence it doesn't get delivered. I am trying to find out where the setting is for test emails.
If you are on 5.26+ CiviCRM version, when you find contact, select list of contact and use 'Register participants for event' from the action list. It takes you to the Create participant form. When you select the event, there will an option for 'Registration Confirmation and Receipt' at the end of the form where you can select or unselect send receipt option.