Message is saved even if no recipient is available

[nicodh]

Followup to #6847

If a message can't be send since the recipient key is missing, the message should not be saved in database.

Current behaviour: the message is saved in state "pending"

To reproduce (in Desktop):

In a chatmail account create a group with a non verified contact

Send a message to that user

An error is shown (when deltachat/deltachat-desktop#5092 is merged )

Leave the chat and open it again

The message is shown in state "Pending"

[iequidoo]

If i try to reproduce this with Desktop 1.59.1 (Core v1.159.5), i see the message in the "Failed" state (with red exclamation mark), even if i leave the chat and re-enter it. Message info:

Sent: 2025.06.05 08:45:49 by Me (abip6f5w4@nine.testrun.org)
State: Failed
Error: Permanent SMTP error: permanent: Encryption Needed: Invalid Unencrypted Mail
Message-ID: 32ef35ba-dffd-466a-84a1-7921d5fde409@localhost

No Hop Info


sent	Thursday, June 5, 2025 8:45 AM (1749123949000)
messageId	15

This looks as the expected behavior. Leaving/re-entering the account also changes nothing.