Email problems can bring your business to a standstill. When messages won’t send or arrive, it’s frustrating and potentially costly. But most email issues stem from a handful of common causes, and you can often fix them quickly once you know what to look for.
Check Your Server Settings First
Your email client needs the right server settings to connect properly. If these are wrong or outdated, nothing will work.
For incoming mail (IMAP/POP3):
- Verify your incoming server address
- Check the port number (usually 993 for IMAP or 995 for POP3 with SSL)
- Confirm SSL/TLS is enabled
For outgoing mail (SMTP):
- Confirm your SMTP server address
- Check the port (typically 587 or 465)
- Ensure authentication is turned on
Your IT provider or email host should have these details. If you’ve recently changed internet providers or moved to a new office, your settings might need updating.
Is Your Mailbox Full?
This one catches people out more often than you’d think. Email providers limit how much storage each mailbox can use. When you hit that limit, new messages bounce back to the sender.
Signs your mailbox is full:
- You can send emails but can’t receive them
- You get warnings about storage space
- Old emails are missing
The fix: Delete unnecessary emails, empty your deleted items folder, and remove large attachments. Consider archiving old messages to free up space.
Authentication Problems
Email authentication verifies you’re allowed to send messages from your email address. Without proper authentication, your emails might not send, or worse, they’ll end up in spam folders.
Common authentication issues include:
- Incorrect password
- Two-factor authentication not set up properly
- OAuth tokens that have expired
- Your email client isn’t configured to use modern authentication
If you’ve recently changed your password, you’ll need to update it in your email client too. Many modern email services now require app-specific passwords for third-party email clients.
Blocked Ports
Your internet service provider or firewall might block the ports your email client needs. This is particularly common if you’re working remotely or using public Wi-Fi.
Standard email ports:
- Port 25 (often blocked by ISPs)
- Port 587 (preferred for SMTP)
- Port 465 (SMTP with SSL)
- Port 993 (IMAP with SSL)
- Port 995 (POP3 with SSL)
If your emails work at the office but not at home, blocked ports are likely the culprit. Contact your ISP or check your firewall settings.
Other Quick Checks
Internet connection: It sounds obvious, but check you’re actually online. Try loading a website to confirm.
Email client updates: Outdated software can cause compatibility issues. Make sure your email client is up to date.
Antivirus interference: Sometimes security software blocks email ports. Temporarily disable it to test (then turn it back on).
Server outages: Check if your email provider is experiencing problems. A quick search usually reveals if others are having the same issue.
When to Call for Help
If you’ve tried these solutions and your email still isn’t working, it’s time to get professional support. Persistent email problems often indicate deeper issues with your IT setup.
Book a call with Nick:
