Internet FAQ's

Q: What is the maximum file size for attachments?

Using DMTS High Speed or dialup service, you can send or receive a single file attachment with no limit.

It is physically possible to send someone a larger file attachment. However, before sending someone a large file you should first ask them if they can handle them. The intended recipient may be on a dial-up service where a large file attachment may cause their service to appear to have stalled while trying to download the large file.

To transfer large files, it would be in the best interest of both the sender and the intended recipient if the file was to be compressed using a program such as 7-Zip ( In order to open it, the recipient must have the ability to un-compress this file. There is an open-source program called 7-Zip available at

Please be aware that DMTS Internet Services does not offer product support for 7-Zip. 7-Zipis mentioned only as a possible solution to problems caused by large email attachments. This does not represent an endorsement of 7-Zip products by DMTS.

Q: Why am I unable to send an email to a large group?

The DMTS email servers will only accept email messages containing a maximum of 100 email addresses. If an email contains more than 100 recipients, the email will not be sent and the sender will receive a ‘return to sender’ message in their inbox.

If you or your business frequently sends email to more than 100 email addresses at one time, it is recommended that you utilize an ’email direct mail’ software program. Most of these email programs are not affected by the 100 recipient limits because they send the message out individually to each person on the mailing list, rather than one email with 100 recipients.

Q: Why can’t I send or receive email?

Try the following steps if you are having trouble sending and/or receiving email :

  1. Ensure you are connected to the Internet. This is usually indicated by a picture of two small computers at the bottom-right-hand corner of your screen. If the computers are present, open your browser and verify that you can browse web pages. If you’re running antivirus software, ensure that email scanning is disabled. Restart your computer and try again.
  2. Confirm your User ID and Password are correct
  3. Check the configuration of your email program

For help setting up email programs like Outlook, Netscape, and Eudora, type the program name in the “Question” field and click “Submit.”

Q: Why did my email freeze while trying to open an email?

If your email appears to be stuck on one message (Example: It will say “Downloading message 4 of 7”), this is usually caused by an email with a large attachment. Slower connection speeds mean a large email takes longer to download than downloading using a High Speed connection.

Follow the steps below to remove this attachment and restore your email’s functionality:

  1. Connect to the Internet
  2. Open a browser window, and blank out the address bar
  3. Type in and press “Enter” on your keyboard
  4. Enter your “Username” (the part before the @ symbol in your email address) and your password.
  5. Click “Login”
  6. You will be presented with a list of emails that you have not yet downloaded. Locate the email that you are having difficulties with by counting down from the top of the page (ie: If it had stalled on “Receiving message 4 of 7”, locate email number 4)
  7. The size of the email will be displayed to the far right of the email in WebMail
  8. At this point, you may view the contents of the message which helps determine whether you wish to save the contents or to delete the message
  9. To delete the message that is stopping your email from downloading, place a checkmark beside the email, and click the Delete button.

You should now be able to open your email program and download your email. If you find that this does not fix the problem, ensure there isn’t another email with a large attachment.

Q: Why do I get a warning that my mailbox is reaching its limit?

You will receive a warning email as your mailbox approaches its capacity or has become full. Remember that if your mailbox on our server is full, you will not be able to receive more email. Anyone sending you a message while your mailbox is full will receive a notice that the message is undeliverable. DMTS WebMail makes it easy for you to view your email and delete the unwanted ones to free up space. To do so, follow these steps:

  1. Open up a browser (Internet Explorer or Netscape will work fine)
  2. Type in the address bar and press enter.
  3. You will be brought to a page asking for your username and password
  4. Enter your email address in the username field, and your password below
  5. Press Login.
  6. You are brought to a screen that shows any mail you have not downloaded from the server – click on a message to view its contents.
  7. Use the buttons across the top of the page to perform the selected action.
  8. If you wish to delete a message, check off the box beside the message and press the delete button at the top of your screen.
  9. If you wish to delete all the messages on the selected page, scroll to the bottom and put a checkmark in “Select All Messages” and press delete.
  10. Go to the Folders tab and empty the Trash.
Q: Why do I get disconnected after sending or receiving an email?

If your connection to the internet is dropping after you send and receive email in Outlook Express, follow these steps.

  1. Open Outlook Express.
  2. Click on Tools.
  3. Click on Options.
  4. Click on the Connections tab.
  5. Remove the check mark beside Hang Up After Sending And Receiving.
  6. Click OK.
Q: Why was my email message delayed?

Email delays occur for a number of reasons including, but not limited to, the ongoing transmission of email viruses on the Internet today. Your best defense against these harmful viruses is virus detection software. Frequently, Internet Service Providers come under attack through the delivery of service denial viruses intended to slow traffic or cripple the delivery of email.

If the email you are expecting is coming from a non-DMTS email address, it’s possible that perhaps that provider is experiencing difficulties as well.

DMTS is constantly monitoring its email servers to ensure optimum performance for its customers. If you find that you are experiencing extended email delays, please contact our technical support staff.