Your emails aren’t being sent, or you’re not receiving anything anymore? Email has become so central that even the slightest malfunction quickly disrupts your daily life, both personal and professional. Good news: email problems most often have identifiable causes and accessible solutions. This guide helps you systematically diagnose why your messages are blocked and restore proper functioning to your inbox.
Identifying the issue
First question: does the problem concern sending, receiving, or both? This guides the diagnosis. Next: does the issue affect all your devices, or just one? If it only appears on one device, the culprit is likely a local setting; if it affects everything, it’s probably the account or the service. Finally, any specific error message, if there is one, is valuable information to note.

Checking the basics
Start with common causes. Is your internet connection working? Without it, no email. Is your inbox full? A full inbox blocks new messages. Are your credentials still valid? A changed or expired password prevents access. These basic checks resolve many cases before you need to look further.
The right reflex. Check if you can access your email directly from a browser (your provider’s « webmail » version). If it works there but not in your usual app, the problem is with the app’s settings, not the account itself. This test immediately isolates the source.

The case of missing messages
Waiting for an email that never arrives? Before concluding there’s a problem, check the spam or junk folder: legitimate messages sometimes end up there by mistake. Also check any filters you may have set up, which could automatically classify or delete certain messages. These two checks explain most « missing » emails.
If an email seems missing, it’s often just hidden in the spam folder or sorted by a filter you set up. Always check these first before assuming it’s a bigger problem.
A user waits for an important email from their bank but doesn’t see it. They check their inbox and find nothing. After looking in the spam folder, they discover the email was marked as spam because of a typo in the sender’s name. The solution was to mark it as « not spam » and add the correct sender to their contacts.
Sending issues
If your emails aren’t being sent, several causes are possible: an issue with your app’s outgoing server settings, an attachment that’s too large blocking the message, or an incorrect recipient address. Checking these points and testing the sending of a simple message without attachments helps isolate the cause. An error message at the time of sending often provides a direct indication of the problem.

Watch out. If your contacts receive strange emails you didn’t send, or if you can no longer log in at all, your account may have been hacked. In this case, immediately change your password from a secure device and enable two-factor authentication. Quick action limits the damage.
Common issues and quick fixes
A few classic situations, resolved in minutes when you know the cause. « Full inbox » without realizing it: reaching the quota blocks reception — delete old large messages (sort by size) and empty the email trash. Password changed, forgotten devices: after a change, each configured device must receive the new password — a forgotten phone in error sometimes blocks the account due to repeated attempts. Sending blocked by an attachment: beyond the limit, the message gets stuck in the outbox AND blocks the rest — delete it, use a sharing link. Replies that never arrive: check your own spam folder, then the configured sending address — a typo in your reply address misroutes everything. Each issue has its logic: finding it avoids panicked reinstallation.


Frequent questions
Why are my emails going to recipients’ spam folders?
Several factors can explain this (sender reputation, content, configuration). For professional use, careful configuration of your email helps avoid this issue.
Should I reconfigure my app?
If webmail works but the app doesn’t, yes: checking or reconfiguring the account settings in the app often resolves the problem.

My sent emails don’t appear in « Sent »: did they go through?
Probably yes if there’s no error message — it’s often a synchronization issue between the app and the server for the Sent folder. Check in webmail: it’s the definitive source for what was actually sent.
Key takeaways
An email problem is solved methodically. First, determine if it affects sending, receiving, or both, and one or all your devices. Check the basics: connection, full inbox, credentials. Test webmail to isolate an app issue. For missing messages, think of the spam folder and filters; for sending, check server settings and overly large attachments. Finally, stay vigilant for signs of hacking. These systematic checks resolve the vast majority of email issues.


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