While it is not possible to recall an email once it has been sent, it may be possible to change images or link destinations, even if the email has already been opened by some recipients.
Submit a ticket with us as soon as you realise the mistake. If the email contained any incorrect links or images, we could then confirm and advise if it is possible to modify these.
In order for us to change the links in an email, we would need a copy of the email from the original send in question. This is due to the tracking links we wrap around your links, and the fact that they are specific to each email send. So if you received the email as part of the send (or if a colleague can forward it to you), we will be able to use this to find the old link, and adjust it to the new link.
Unfortunately, it is not possible to modify the subject line, text or HTML content of the email once it has been sent.