I noticed that hyperkitty_import has issues with In-Reply-To header when importing archives downloaded from Hyperkitty itself.
In some cases in_reply_to field in hyperkitty_email table will have extra white space at the start.
For example In-Reply-To: CAFV2YWOfZRHEDTTz3F6Emnwx8Sh4_Ar7+JMR7XvOAD8_eOjqaQ(a)mail.gmail.com
will be saved as ' CAFV2YWOfZRHEDTTz3F6Emnwx8Sh4_Ar7+JMR7XvOAD8_eOjqaQ'.
This results in broken threads, as parent of this message cannot be found.
I also noticed that hyperkitty_import doesn't have this problem with archives from MM2, but in MM2 archives, message id in in-reply-to header is
surrounded with brackets, like this: In-Reply-To: <CAFV2YWOfZRHEDTTz3F6Emnwx8Sh4_Ar7+JMR7XvOAD8_eOjqaQ(a)mail.gmail.com>
When I look at original email source, in-reply-to header doesn't have brackets; it looks like in the archive made by HK.
Is the issue here with import or export (download) process?
Is hyperkitty_import right tool for migrating lists from one MM3 server to another?
I was thinking should I post this to the mm3-users list or here, I hope I made a right decision.