Your inbox has gone quiet. No error message, no warning, just the messages you were expecting that never arrived.
Here are ten reasons why emails stop arriving, where to look, and how to fix each one. After the table you’ll see what actually happens to a message between the sender and you, which makes it clearer whose end the problem is on.
Why am I not receiving emails? The 10 most common causes
Before you start changing settings, rule out the simple explanations. A lost connection is the most common one, and while your device is offline the app looks empty even though your mail is sitting on the server.
It’s worth checking that your provider isn’t down and that you’re looking at the right account rather than an alias or an old address the sender used. Some mail is only delayed rather than lost, so give it a few minutes before assuming the worst.
| Cause | Where to check | Quick fix | |
| 1 | Overly aggressive spam filter (often based on automated content scanning) | Spam or junk folder | Mark as not spam, then add the sender to your whitelist |
| 2 | Sorted into a secondary tab or folder (Promotions in Gmail, Focused Inbox in Outlook) | Other tabs and categories | Move the message to your main inbox so later ones follow |
| 3 | Filter or rule redirecting messages | Your filter and rules list | Delete or edit any rule that archives, labels or deletes |
| 4 | Forwarding enabled to another address | Forwarding settings | Switch it off, or stop it deleting the local copy |
| 5 | Mailbox storage full | Storage or quota indicator | Empty trash and spam, then clear large attachments |
| 6 | Sync issue or offline mode | Your mail app, then the same account in a browser | Refresh manually, leave offline mode, restart the app |
| 7 | Incorrect IMAP or POP settings | Account settings in your mail client | Retype the server addresses and ports your provider lists |
| 8 | Two factor authentication blocking a third party app | Security settings | Generate an app password for that client |
| 9 | Sender typed the wrong address | Ask the sender | Have them check the address and resend |
| 10 | Sender’s domain fails authentication or is flagged, so your provider rejects or filters it (missing or misconfigured SPF, DKIM or DMARC records, a blocklisted domain, or a server outage) | Ask the sender for the bounce message | The sender fixes their records, or you add them to your whitelist |
A note on the first cause. The more parts of a message a filter checks, the more likely it is to make a mistake and flag a legitimate message. Business mail gets caught most often, because the terms that make it sensitive are exactly the ones filters are trained to distrust. And this happens more than most people realise: Validity’s 2026 deliverability benchmark put average inbox placement for legitimate commercial email at 87.2%, which means roughly one in eight of those messages never reaches the inbox at all.
If one specific contact’s emails never seem to reach you, while everyone else’s messages arrive fine, the problem is usually not “the internet” but a narrow delivery issue between two accounts. In this short video, Leo Notenboom from Ask Leo! walks through the most common causes and practical checks you can do, from simple typos and spam filtering to reputation problems with an email service.
How email delivery actually works
A message leaves the sender through SMTP, the protocol that moves mail between servers. It reaches your provider’s incoming server, which checks where it came from and scores it for spam. Only then is it filed in a folder, and your device collects it from there.
That gives three stages, and three places a message can stop. Working out which one failed tells you whether to change a setting, contact your provider, or ask the sender to try again.
Before looking at the different ways email can be delivered, it helps to understand the two main methods, IMAP and POP:
IMAP leaves your mail on the server and mirrors it across every device you use. POP downloads it to one device and can delete the server copy, which is why a message can show up on an old laptop and nowhere else.
Not getting emails on your phone?
If mail arrives on your computer but your handset stays silent, the message reached your account and your phone simply isn’t collecting it. Check that background refresh is on, that the app isn’t in offline or low data mode, and that your password is current. Changing it can quietly break a saved connection. Opening the same account in a mobile browser confirms whether the mail is waiting on the server.
Not receiving emails in Gmail, Outlook, or Apple Mail?
The causes above apply everywhere. What changes is where each service hides the setting.
Tabs, rules and storage indicators sit in different menus depending on what you use, so a fix that takes 30 seconds in one place can take five minutes of hunting in another.
Our guide (coming soon) to troubleshooting emails not coming through in Gmail, Outlook and Apple Mail walks through each one, including category tabs, Focused Inbox, cached mode, and fetch settings on Apple devices.
The short answer
If you’re still asking why am I not getting my emails, work down the table in order. The first few checks settle most cases in a couple of minutes.
It’s worth noticing how much of that sorting happens without you. Email filters, tabs and scoring decide what reaches you before you’ve opened anything, and it’s fair to ask how much control you actually have over your own inbox.
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FAQ: Why am I not receiving emails
How do I tell quickly whether the problem is on my end or the sender’s?
Send yourself a message from a different account. If it lands, your inbox is receiving mail normally, so the problem is more likely on the original sender’s end. This won’t catch every case, since a particular sender’s domain can still be filtered on its own, but it rules out a completely broken inbox in seconds.
Can a missed email still arrive later?
Yes. A temporary rejection makes the sending server keep retrying for several days, so delayed mail often appears on its own.
How long before an email disappears from spam for good?
Most providers empty the spam folder automatically after 30 days, and that deletion is permanent. Check it weekly when you're expecting something important.
Can antivirus software, a firewall or a VPN stop emails arriving?
They can. Security software that scans mail, or a network that blocks the ports your client uses, will leave the app connected but empty. Pause the scanner or switch networks to test it.
