If it's via email I doubt the file is too large. It's likely an issue with the email settings. Are you logged in through a website, or do you go through a shortcut on the phone like gmail?
Generally when I have issues like this it's because something has changed in my email account settings, I've been logged out etc. Sadly I'm not tech savvy enough to offer more specific advice.
If it's via email I doubt the file is too large. It's likely an issue with the email settings. Are you logged in through a website, or do you go through a shortcut on the phone like gmail?
In my case, I have my yahoo account synced on my phone so I don't have to login to yahoo.com and enter password to check. Doing this creates a shortcut on the phone.
When I originally configured I was prompted to choose server settings (IMAP or POP3) and security type. I believe the configuration varies based on the email provider and I had to do a pretty extensive search to find step-by-step guide to do it. If the settings aren't correct it creates issues.