I have a Samsung S6 and up until a couple of days ago I could send and receive Emails. Now when I go onto my Email account it says there are no Emails, there is also a message stating 'you may have emails that have not yet been retrieved from the server' (I have rec'd Emails on my computer for the same Email account). Nor can I now send Emails from my phone. As I say up until a few days ago it was working fine. I'm not particularly computer savvy and suspect I may have inadvertently caused the problem, I've checked you tube tutorials and searched for an answer online without luck. I've checked the settings but found nothing wrong. Can anyone help please?

Check your sync settings

Thank you for helping, most of them were turned with the exception of a couple... calendar and task I think. As someone else set the account up for me I wasn't sure if they needed to be turned on, but I've done that now and my Emails are back... Thank you :)