1. You can use this thread to upload your pictures to this site (attach them to a dedicated message) and then reuse the picture links ("right"-click the picture to access it's URL) from the resulting heap in your delivery report post. (You can even try to make it tidy by deleting the dedicated upload message but the pictures should go too - it can be tested if they will persist.) You can attach your pictures to the same delivery report post and then reuse them (the links) in the text to keep it one message (with a picture heap at the bottom though) rather than two (the report and the picture source for it).
2. You can split your story into a sequence of messages each with a single picture attached.
3. You can use a free image hosting site to insert links to your pictures posted there.
Not recommended but already suggested above.
For resizing a simple picture editor like Windows Paint (to be withdrawn reportedly
) or may be the smartphone's one (never used mine yet
but there is the capability) can be used.