Email fails in a surprisingly limited number of ways — but people tend to treat all of them identically, which leads to a lot of time spent on the wrong fix. The first step isn’t to call anyone or change any settings. The first step is to figure out which specific thing has stopped working. That alone narrows the problem considerably.

First: check the obvious

Before anything else — is your internet connection working? Open a browser and try to load a website. If that doesn’t work, your email problem is actually an internet problem, and the email app is just the first place you noticed it. Restart your router, check your connection, and come back to email once you’re back online.

If the internet is fine, try logging into your email through a web browser — not your email app, but the provider’s actual website. Gmail.com, yahoo.com, or wherever your account lives. If you can get in there and everything looks normal, the problem is with your email app, not your account. That’s a narrower, more solvable problem.

Can’t send, but can receive

Mail arrives normally but anything you try to send sits in the outbox or bounces back. This is almost always a configuration issue — specifically with the settings for outgoing mail. It can also happen after a password change that wasn’t updated in the app, or after an internet provider makes changes on their end. It is not a sign that your account is broken or your email is lost.

Can’t receive, but can send

You can send mail, but nothing new is coming in. First check: is anything actually being sent to you? Ask someone to send a test message and see if it arrives through the web browser version of your email. If it shows up there but not in your app, the app’s incoming mail settings need attention. If it’s not arriving anywhere, check whether your inbox is full — many providers stop accepting new mail when storage is exceeded.

Password suddenly wrong

Your password stops working without you changing it. Two common causes: the account was compromised and someone changed the password, or the provider updated their security requirements and your app’s stored password is now outdated. Either way — log in through the web browser first to confirm whether the password actually works. If it does, update it in your app. If it doesn’t, use the account recovery process to regain access, then change your password and check whether anything was tampered with.

Account suspended or locked

Providers lock accounts for several reasons — suspicious login activity, too many failed password attempts, a billing issue if it’s a paid account, or simply inactivity on very old accounts. The message when you try to log in usually tells you which one. Follow the provider’s recovery process. If the account has been inactive for years on a provider that closes dormant accounts, recovery may not be possible — which is a good reason not to let important accounts go unused.

Everything looks fine but mail is missing

You’re logged in, the app is working, but specific messages aren’t where you expect them. Check a few things: is there a filter or rule that’s automatically moving or deleting incoming mail? Did something end up in the spam folder? If you’re on a setup that downloads mail locally, did it get downloaded to a different device? Missing mail that was definitely there before is worth investigating carefully before assuming it’s gone permanently.