For most people and businesses, email is an essential way to communicate. Whether you are sending a quick update to a colleague, need to send an important invoice or want to stay in touch with customers: email is indispensable. Still, all kinds of problems can come up when you use email.

In this article we go over the most common problems and how you can solve them. That way your email always works quickly, securely and reliably.

Looking for a reliable and affordable email solution? At Theory7.net you can get web hosting and email plans that let you easily create your own email addresses at the lowest price in the Netherlands.

1. Problems sending emails

1.1 Email does not arrive (or is marked as spam)

A common problem is that sent messages do not reach the recipient's inbox. Sometimes they end up in the spam folder, or they do not arrive at all. Possible causes are:

  • Incorrect configuration of DNS records (SPF, DKIM, DMARC): these records help internet providers recognize that emails really come from your domain. If they are not set up correctly, your email can be seen as untrustworthy or as spam.
  • Sending through an unreliable mail server: if your server or IP address is on a blacklist, your mail can be marked as spam or blocked.
  • Lack of trust: if the recipient does not recognize your domain or email address, that can also result in a spam flag.

Solution:

  • Always check first whether you have set up your DNS records correctly (SPF, DKIM and DMARC).
  • Use a reliable hosting or mail provider (such as Theory7.net) that makes sure its mail servers are not on blacklists.
  • Ask recipients to mark your email address as trusted or add it to their address book.

1.2 Wrong SMTP settings

Another reason emails cannot be sent is that your SMTP details (server, port, encryption, username and password) are set up incorrectly.

Solution:

  • Check with your hosting provider which SMTP server and port you need to use. Here is an overview of all email settings per provider.
  • Make sure your username and password are entered correctly and that you use the right encryption (SSL/TLS).
  • If you want to send mail from your own domain but use a different service (for example Gmail), you need to configure the "Send mail as settings correctly within that service.

2. Problems receiving emails

2.1 Inbox gets full

A classic complaint is that you can no longer receive emails because your mailbox is "full". This mostly happens with mailboxes that have a small storage limit or when you receive a lot of attachments.

Solution:

  • Clean up your inbox regularly: delete old messages or large files that are no longer relevant.
  • Consider a cheaper and larger email plan at Theory7.net, or generous hosting with enough storage.
  • Use IMAP instead of POP3, so your folders stay in sync and you have the same layout on every device. It is important to keep an eye on your total storage capacity, though.

2.2 Messages do not come in

Nothing is as annoying as important messages that do not show up in your inbox. Possible causes include:

  • Wrong IMAP/POP3 settings in your mail client.
  • No MX record or an incorrect MX record in your DNS settings.
  • Your provider has blocked your account for exceeding limits or for suspicious activity.

Solution:

  • Check your mail settings (server, port, encryption, username, password).
  • Check in your DNS whether your MX records are set up correctly.
  • Contact your provider if your account suddenly stops working.

3. Security and privacy problems

3.1 Phishing and malware

Phishing emails are messages that pretend to be trustworthy (for example from your bank or a well-known company), but are actually trying to steal your passwords or payment details. Malware can be hidden in attachments.

Solution:

  • Never open attachments or links from senders you do not trust.
  • Use a spam and virus filter. At Theory7.net, spam filters are actively used to intercept suspicious messages early.
  • Check the sender address carefully. It often looks real, but has small differences.

3.2 Insecure connection (no SSL/TLS)

If you log in to your email over an unsecured connection, hackers may be able to intercept your login details.

Solution:

  • Always use SSL/TLS for sending and receiving emails.
  • Check that your certificates are correct and up to date.
  • Choose a reliable mail provider that takes security seriously.

4. Password problems

4.1 Forgotten password

We have all been there: you try to log in and your password turns out to be wrong. If you have not linked a backup email address or cannot easily reset the password, you get stuck.

Solution:

  • Use a password manager to store your passwords securely.
  • Set up a recovery method (through an alternative email address or a phone number).
  • Ask your hosting or mail provider for help resetting your password if you really cannot get in anymore.

4.2 Password too weak

A weak password can make your mailbox easy to hack. That can lead to misuse of your email address and leaks of confidential information.

Solution:

  • Use a combination of letters (both uppercase and lowercase), numbers and special characters.
  • Set a new password periodically, especially if you suspect someone has had unauthorized access.
  • Avoid obvious passwords such as "123456" or "qwerty".

5. Sync problems across multiple devices

These days we check our email on different devices: laptop, smartphone and tablet. If they do not sync properly with each other, you can miss important messages or lose track.

Solution:

  • IMAP instead of POP3. With IMAP, emails are stored on the server and every device syncs continuously.
  • Check in your mail client that the folder layouts are correct, so sent items, trash and drafts are the same on all devices.
  • Make sure you have a stable internet connection on every device.

6. Too much advertising (spam) in your inbox

An overflowing inbox full of unsolicited advertising or phishing messages is frustrating and can cause you to overlook your real emails.

Solution:

  • Activate the spam filter at your provider and configure it correctly.
  • Manually mark unwanted messages as spam, so the system can learn and your inbox stays cleaner.
  • Consider upgrading at Theory7.net to a plan with advanced spam and virus filtering.

7. Error messages or timeouts with large attachments

When you try to send a large attachment, your mail client may freeze or show an error message: "Attachment too large". Many mail servers set a limit on the maximum size of attachments.

Solution:

  • Reduce the size of your file or compress it (for example .zip).
  • Use a cloud storage service such as WeTransfer, Dropbox or Google Drive and send the link by email.
  • Check with your provider whether your plan has a limit for large attachments and upgrade if needed.

8. Automatic replies and filters that do not work

Some users want to set up automatic replies (for example when you are on vacation) or filters (to sort messages). If these features do not work properly, it can lead to missed messages or unwanted mail in the wrong folder.

Solution:

  • Look in your provider's control panel or webmail environment to see how to set up automatic replies and filters.
  • Test the settings by sending an email from another account.
  • At Theory7.net you can easily manage these features from the customer portal and webmail.

Why choose Theory7.net?

At Theory7.net we understand that email is crucial for your communication. Our web hosting and email plans are:

  • Affordable: you benefit from the lowest price in the Netherlands and Belgium!
  • Scalable: whether you need one mailbox or several, there is always a plan that suits you.
  • Reliable: we provide stable mail servers, up-to-date spam filters and regular backups.
  • Easy to manage: with our user-friendly control panel you can create new email addresses, set passwords and manage DNS records in no time.

By understanding the causes of the most common email problems and applying the right solutions, you can keep your email traffic running smoothly and securely.

Still can't figure it out, or looking for an affordable email plan that fits your needs? Feel free to take a look at Theory7.net and discover our various hosting and email solutions. That way you can count on reliable email without it costing you a fortune!