The basic steps to open and read a message
Opening mail in your email client is straightforward: click or tap the message in your inbox, and it opens in a reading pane or new window. The exact steps depend on which client you use — Gmail, Outlook, Apple Mail, Thunderbird — but the principle is the same across all of them. Your inbox shows a list of messages; selecting one displays its full content.
Most email clients show you a preview of the first few lines of each message in the inbox list. This preview helps you decide which messages to read first without opening them. Once you click a message, the full email appears with the sender's name, subject line, date, and the complete message body.
If you're using a phone or tablet, the process is nearly identical. Tap the message in your inbox list, and it expands to show the full content. On smaller screens, you may see the message in a full-screen view rather than a side panel.
Key Takeaways
- Click or tap any message in your inbox to open it and read the full content.
- Most email clients show a preview of the first few lines in the inbox list so you can scan messages before opening them.
- Opened messages display the sender, subject, date, and full message body in a reading pane or separate window.
- On phones and tablets, tapping a message usually opens it in full-screen view rather than a side panel.
- You can return to your inbox list by clicking the back arrow or closing the message window without deleting or changing anything.
Opening messages on desktop email clients
On desktop versions of Gmail, Outlook, Apple Mail, or Thunderbird, your inbox appears as a list on the left or center of the screen. Each row shows the sender's name, the subject line, and a snippet of the message. Click any row to open that message.
In Gmail and Outlook, the message opens in a reading pane on the right side of the screen by default. You can still see your inbox list on the left, so you can switch between messages without closing the current one. In Apple Mail and Thunderbird, clicking a message may open it in a separate window or in a split view, depending on your settings.
If you want to see the message in a larger view, most clients let you click an expand icon (usually a small arrow or box icon near the top of the message) to open it in full-screen mode. This is useful if the message contains images, tables, or formatting that is hard to read in a narrow pane.
Opening messages on phones and tablets
Mobile email apps work the same way as desktop clients, but the layout is different because of the smaller screen. Your inbox shows a vertical list of messages. Tap any message to open it.
On most phones, opening a message takes over the full screen. You see the sender, subject, date, and the complete message body. To return to your inbox, tap the back arrow at the top left of the screen. On tablets, some email apps show the inbox list on the left and the message on the right, similar to desktop Outlook or Gmail.
If a message contains images or attachments, they appear below the message text. You can tap an image to view it in full size, or tap an attachment name to read or open it.
What happens when you open a message
When you open a message, your email client marks it as read. Most clients change the appearance of that message in the inbox — it may no longer appear in bold, or a small icon may change to show it has been read. This helps you keep track of which messages you have already seen.
Opening a message does not delete it, move it, or change it in any way. It straightforward displays the content. The message stays in your inbox until you manually delete it, archive it, or move it to another folder.
If a message contains a link or an image that loads from the internet, opening the message may cause your email client to read that content. Some email clients ask for permission before loading images from unknown senders, as a privacy measure. This is a security feature to prevent senders from tracking whether you opened their message.
Navigating between messages without closing
Most email clients let you move from one message to the next without closing the current one. Look for arrow buttons near the top of the message — usually labeled with up and down arrows or "previous" and "next." Click these arrows to jump to the message above or below in your inbox list.
This is faster than closing a message, returning to the inbox, and clicking the next one. It is especially useful if you want to quickly scan through several messages in order, or if you are looking for a specific message and want to check each one without losing your place.
On mobile apps, you can usually swipe left or right to move to the next or previous message. Check your app's settings or help section if the arrow buttons are not visible.
Opening messages in conversation view
Gmail and some other clients use conversation view by default. Instead of showing each message as a separate item in your inbox, conversation view groups all messages in a back-and-forth exchange under a single subject line. When you click a conversation, all the messages in that thread open together, stacked vertically.
In conversation view, you can see the entire history of an exchange at once. Each message in the thread shows the sender, date, and content. You can scroll through the conversation to read messages in order, or click individual messages within the thread to expand or collapse them.
If you prefer to see each message separately instead of grouped, most clients let you turn off conversation view in settings. The exact location of this setting varies by client — in Gmail, it is under Settings > General > Conversation View.
Troubleshooting when messages won't open
If you click a message and nothing happens, the most common cause is a slow internet connection. Wait a few seconds and try again. If the message still does not open, try refreshing your inbox by pressing F5 on Windows or Command-R on Mac, or by tapping the refresh icon in your mobile app.
If a specific message consistently fails to open, it may be corrupted or very large. Try opening a different message to confirm your email client is working. If other messages open normally, the problem is with that one message, not your client or connection.
If no messages open at all, check that you are connected to the internet. On mobile, make sure you are on WiFi or have cellular data enabled. On desktop, try closing and reopening your email client. If the problem persists, restart your device.
Frequently Asked Questions
Does opening a message send a read receipt to the sender?
Not automatically. Read receipts are optional and must be enabled by the sender when they compose the message. If a sender requests a read receipt, your email client will ask you whether to send one when you open the message. You can choose to send it or decline.
Can I open a message without marking it as read?
Most email clients do not offer this option — opening a message marks it as read automatically. However, you can mark a message as unread again after reading it. Look for a "Mark as Unread" option in the message menu or right-click menu. This is useful if you want to come back to a message later.
What if a message contains an attachment I cannot open?
The attachment may be in a file format your device does not support, or your device may lack the software needed to open it. Try downloading the attachment and opening it with a different program. If you are unsure what program to use, search online for the file extension (the letters after the dot in the filename).
Can I open messages offline?
It depends on your email client and settings. Gmail and Outlook can be set to read messages for offline reading, so you can open them without an internet connection. Apple Mail and Thunderbird store messages locally by default, so you can open them offline. Check your client's settings to see what offline options are available.
Why do some messages show images as blocked?
Your email client is blocking images from loading automatically as a privacy measure. Senders can use image tracking to see when you opened their message. To view the images, click the "Show Images" or "Load Images" button that appears in the message. This is safe to do for messages from people you trust.