fix: Don't send self-avatar in unencrypted messages (#7136) #7209
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We don't display avatars for address-contacts, so sending avatars w/o encryption is not useful and causes e.g. Outlook to reject a message with a big header, see https://support.delta.chat/t/invalid-mime-content-single-text-value-size-32822-exceeded-allowed-maximum-32768-for-the-chat-user-avatar-header/4067.
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`chat::set_chat_profile_image()` already checks that the group has grpid, still it makes sense to check that a message is encrypted when sending, in case if the chat has a profile image in the db for some reason.
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link2xt
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Nov 28, 2025
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We don't display avatars for address-contacts, so sending avatars w/o encryption is not useful and
causes e.g. Outlook to reject a message with a big header, see
https://support.delta.chat/t/invalid-mime-content-single-text-value-size-32822-exceeded-allowed-maximum-32768-for-the-chat-user-avatar-header/4067.
Close #7136