1797061 - Implement `Write > To | Cc | Bcc` submenu for selected mailing list or multiple selection in address book

Status: NEW

(Thunderbird :: Address Book, enhancement)

Description

[Thomas D. (:thomas8)]

For a mailing list or multiple selected contacts/lists, there's no direct way from address book to use them as Bcc recipients. Changing recipient type after the fact is clumsy and error-prone (easy to forget). We should be more helpful by enabling this with a plain vanilla submenu for those selections.

STR

• Select a mailing list in your AB, or multiple contacts/mailing lists/combinations thereof (iow, select anything, but not a single person's contact)
• Intend to use the mailing list or selected items as Bcc
• Right-click on selection

Actual

• Only Write action is offered, which defaults to To

Expected

• Offer an easy way to directly use selected items as Bcc

Proposed implementation

• If a single contact is selected, show current Write menu (To) - adding flavor selection here would be a bit tricky as we may have the multiple email addresses submenu already.
• Else (if multiple contacts and/or one or more mailing lists selected), hide Write and show Write > with submenu instead:

  Write > To
          Cc
          Bcc
  

Comment 1

[Thomas D. (:thomas8)]

Re-inspired by recent user support issues like
https://support.mozilla.org/en-US/questions/1390445
https://support.mozilla.org/en-US/questions/1127065

Using Bcc for mailing lists or multiple selected contacts can be expected to be a pretty frequent use case which we should support wrt email privacy. I've also suggested this 12 years ago in Bug 273879 Comment 6, and it looks easy enough to implement per my comment 0.