The system preference, EmailPurchaseSuggestion is missing from the 19.05 (and 19.11) manual. Here is the information needed for this system preference There are two new system preferences that work together on this new feature: EmailPurchaseSuggestions &EmailAddressForSuggestions There are a few options for the first system preference, EmailPurchaseSuggestion. The email can be sent: -None -Email Address of Branch (found in the Libraries section of Admin) -Email address for Suggestions - which if chosen, then the next system preference will be used -Koha Admin Email Address- which is an email in the system preference, KohaAdminEmail. If a library would like to use an email separate from either the Email Address of the Branch ore the Koha Admin Email Address, then the next system preference, EmailAddressforSuggestions, should be filled in. If a library does not want to be emailed when a purchase suggestion has been made, a library would choose None (which will be set as the default on an upgrade). There is a new notice that is called New_Suggestion for this email.
Done for 21.05