Images not showing in Campaigns when emailed

Images not showing in Campaigns when emailed

To whom it may concern:

I have recently emailed a campaign and have tested it on my computer and a colleagues and the pictures appear on mine but only appear with an 'x' in the top left corner of my colleagues. Is there a way to adjust the pictures so that they are sure to show up on our customers computer as I am not sure if they can see them?

Thank you,

Dom