Overview

The headers of an email message can provide many different data points that can be used to troubleshoot deliverability issues.

AOL

1. Right click on the message in question.

2. Select View Message Source from the menu. This creates a pop-up window that displays the full headers.

ATT.net

ATT uses the Yahoo interface.

1. Right click on the message in question.

2. Select View Raw Message from the pop-up menu.

3. This creates another tab which displays the full headers.

Comcast (Spectrum)

1. From the homepage right click on the message in question. Select View page source from the drop-down.

2. This opens a new tab complete with headers.

Cox

1. Double click to open the message in question.

2. Select the More button in the Toolbar. This opens a small drop down.

3. Select View Source from the menu. This creates a pop-up window that displays the full headers.

Gmail

1. Double click to open the message in question and click on the three dots on the far-right side. This opens a small drop down.

2. Select Show Original from the menu. This opens another tab which displays a Gmail-created snapshot of important parts of the headers. The full headers are listed below the snapshot.

Hotmail

1. From the homepage right click on the message in question. Select View Message Source from the menu.

2. This creates a small pop-up window with the headers inside. This is very difficult to read. We recommend you copying the headers and pasting the data into MS word/Google Sheets.

iCloud.com

1. Double click on the message in question.

2. Click on the Action-pop-up menu (gears) in the toolbar.

3. Choose Show Long Headers.

Mail.com

1. Double click to open the message in question.

2. Select the “i” icon button in the Action Toolbar next to the timestamp. This creates a small pop-up window with the headers inside.

Mail.ru

1. Double click to open the message in question.

2. Select the More button in the Toolbar. This opens a small drop down.

3. Select Headers from the menu. This creates another tab which displays the full headers.

OptOnline - Optimum Online

1. Double click to open the message in question or open in the “preview mode”.

2. Select the Options button in the Toolbar. This opens a small drop down.

3. Select View Source from the menu. This creates another tab which displays the full headers.

Roadrunner

1. Open message in question.

2. Click on the “down arrow” on the upper right-hand corner and select View headers.

SBCGlobal

1. Open the message in question and select More.

2. From here go to Toolbar and click on Header.

Windows Outlook

1. First, you must be configured to read email headers. Once set up, you can then read the headers.

2. Click the Customize Quick Access Toolbar at the top left of the Outlook window.

3. Select More Commands.

4. Click the Choose Commands From menu and select All Commands.

5. Find Message Options in the list and click Add then OK.

6. To view the headers, click on the Message Options button in the top left corner.

7. The headers appear in a small pop-up.

Yahoo

1. Right click on the message in question and select View Raw Message from the pop-up menu.

2. This creates another tab which displays the full headers.

Zoho

1. Double click to open the message in question.

2. Select the Down Arrow button in the Action Toolbar. This opens a small drop down.

3. Select Show Original from the menu. This creates another tab which displays the full headers.