If I block someone in WhatsApp and then unblock them, will messages be delivered - briefly?
Blocking a contact on WhatsApp prevents you from receiving their messages. Once you unblock them, any new messages they send after the unblock will be delivered to your chat list.
If I block someone in WhatsApp and then unblock them, will messages be delivered - in detail?
If you block someone on WhatsApp and later decide to unblock them, the delivery of previously sent messages is subject to certain conditions. When you block a contact, any messages they attempt to send will fail to deliver, indicated by a single checkmark (which means the message was sent but not delivered). Once you unblock the contact, they will be able to send new messages, and these will be delivered without issue, as indicated by two checkmarks.
However, previously undelivered messages from when the contact was blocked will not automatically become deliverable. These messages with a single checkmark will remain in your chat history but will not be sent or delivered until you manually forward them to the unblocked contact. It is important to note that forwarding these messages does not guarantee they will be seen, as the recipient may have deleted their copy of the conversation or chosen not to view old messages.
In summary, while blocking and then unblocking a contact on WhatsApp allows for the delivery of new messages, previously sent but undelivered messages require manual intervention to be resent and potentially viewed by the recipient.