How to view email headers in any email program

Do you have a spam problem and you need help to understand why you got it or what happened? Do you have a message failure or bounce error? The tecnician helping you with this problem will probably ask for this information.


  • Select the spam message
  • Click the down arrow next to to the reply arrow
  • Select "View message source."

Apple Mail

  • Select the spam message
  • Click View > Message > All Headers


  • Double-click to select the spam message and open it in a new window.
  • Click File > Info > Properties.
  • The header is displayed under "Internet Headers."


  • Select the spam message.
  • Click View > Headers > All.


  • Select the spam message.
  • Click "Full Headers" below the email.


  • Select the spam message.
  • Click the down arrow next to the reply arrow.
  • Select "Show Original."


Choosing a default email application

How to tell your Mac which program you want to use to send an Email.

Open Mail (/Applications/Mail).


Do this even if you don’t want to use Mail! Yes, it’s counterintuitive, but, work with me here.

From the Mail menu, choose Preferences.


Click the General button.


Choose your desired default email application from the "Default email reader" pop-up menu.


Top 5 Effective E-mail “Do’s

Top 5 Dos

5. Put important information in bold, so it’s easier to see. Likewise, if you’ve addressed an e-mail to several people and there’s an action for a certain person, bold his or her name when you address the issue. Use bold sparingly, though.

4. If action is required, say so at the start of the e-mail. Don’t tell a long story with the requested action at the bottom. This is called the BLUF method, but I also tend to call it “getting to the verb.”

3. Keep your signature short and professional. Lose the pithy quote and just include your title and phone number.

2. Keep the subject line relevant. If the topic changes over the course of a long thread, update the subject so it’s relevant.

1. Proof your e-mail before you send it. And make sure your spell checker is running.

via Top 5 Best Practices for Writing Effective E-mail | Business Hacks | BNET.

Top 5 Effective E-mail “Dont’s

Top 5 Don’ts

5. Don’t ever type anything in ALL CAPS, even to get someone’s attention. If you need to catch someone’s eye with something important, put it in bold.

4. Don’t include your entire team or your boss on every e-mail you send. Be selective.

3. Don’t send large attachments unless absolutely necessary, especially to a mailing list or distribution list. If possible, upload your files to the cloud, such as DropBox or MemoPal and provide a link.

2. Don’t send e-mail when you’re emotional. If you’re responding to someone that has made you angry, save the message in your drafts folder until you can proof-read it more objectively, and then send the e-mail.

1. Don’t try to be funny, especially to a mixed audience. The chances of being misunderstood are astronomical.

via Top 5 Best Practices for Writing Effective E-mail | Business Hacks | BNET. – About reindexing messages

If there are problems with information in your mailboxes, it may be necessary to reindex your messages. During this process, certain Mail folders on your computer are moved to another location, such as your desktop. When Mail is reopened, it rereads and reindexes all messages in all local mailboxes. The reindexing process can take several minutes depending on how many messages are in your local mailboxes.

When Mail detects a problem with your mailboxes, it may alert you that it needs to repair them by reindexing your messages. At other times, you can reindex messages yourself. To do so, quit Mail and, in the Mail folder in your home Library folder, move the Envelope Index file and any folders that begin with “Mac-“, “Exchange-“, or “IMAP-” to a different location, such as your desktop. When you reopen Mail, it reindexes all messages. – Rebuilding mailboxes

In some cases, you might need to rebuild a mailbox to update the list of messages in the mailbox–for example, if messages appear to be missing or garbled, or if you can’t find all relevant messages by searching. Rebuilding a mailbox can take awhile; it’s recommended for fast Internet connections only.

To rebuild a selected mailbox:

Choose Mailbox > Rebuild.

For IMAP accounts, locally cached messages and attachments are discarded and the messages and attachments are downloaded again from the server to your computer. Your mailbox appears empty until the download is complete.

Aligning Kerio Webmail and Apple Mail

You may have noticed that your Sent, Trash, and Drafts folders differ depending were you view them. The problem is that doesn’t look for existing folders with the name Sent, Drafts, or Trash (or Deleted) in them; it creates ones with those names. Furthering the confusion, you can’t change these in the Kerio Webmail interface. Read on to learn how to minimize the confusion.

UPDATE – I’ve discovered that if you set up your Mail account as an Exchange account (vs. an IMAP account), this is not necessary.

Identify the correct folders


Since you can’t change the folders that Kerio Webmail uses, has to be the one that yields. When you log into Webmail, note the subtle difference in the name of the folders; Kerio includes the word "Items" in the various folders. The Inbox on both systems the same but Webmail uses Deleted Items and Sent Items. For some reason, though Drafts is the same, but doesn’t find it, either. Once identified, move your mail from the old/wrong folder to the correct folder.

In the example above, you’ll see a system that shows both Deleted Items and Deleted Messages. Deleted Items is the folder Webmail uses, and Deleted Messages is the one uses.


Prepar to move the existing messages


This step can be done in or Web mail. It’s FAR FASTER to do it in Webmail. And you can speed up this process by changing the number of messages in your list from 25 to 200 in Webmail’s Settings dialog box.

Select the OLD mail folder in the list of folders. Select all in the list of messages. Right (Control)-Click to see the menu on the right above and select Move or Copy.

Move the messages


As you click Move or Copy in the previous step, this new window will open. Click Move to get the messages from one folder to the other.

Switch to


Now is a good time to tell you about a irritation in Apple Mail; doesn’t show you all of the folders that reside on the mail server easily. You’ll find a list of all the folders on the Mail server under the label that contains the name of your account (the name of the account is arbitrary, and it is set or changed in Mail -> Preferences -> Accounts -> {name of your account} -> Account Information -> Description)

To see the folder that Kerio Webmail is using for Sent, Trash, and Drafts, turn the arrow down next to the account name.

All Folder View


When you click the arrow next to a folder or account name, the contents are shown (just like most any other Mac application that presents / hides information in lists and sub lists).

Select the Sent Items folder


This is where you alter where stores it’s messages for the various folders. Select the Sent Items folder as shown.

Assign the new Mailbox use


After you selected the proper Sent folder in the previous step, use the Mailbox menu to select Use This Mailbox For -> Sent. Mail will swap the folders to their new use, so make sure you check to make sure the old folder still doesn’t have any mail left in it, or that you have another computer that needs this modification.

And the repeat the above steps (starting at Step 1) for the Trash/Deleted, Junk and Deleted folders.

And keep this tip around because every so often, Mail resets this preference for you.