The fastest way: use the Mail app's attachment button

Open the Mail app and start a new email by tapping the compose button (the pencil-in-a-square icon in the bottom right). Address the email and write your message. Then tap and hold in the message body until a menu appears, and select Add Attachment. This opens your photo library and files — tap the file you want, then tap Add.

If you don't see the Add Attachment option when you tap and hold, swipe up from the bottom of the keyboard to reveal more options. The attachment button looks like a paperclip. Tap it, then select the file from Photos, Files, or iCloud Drive.

Not all file types work the same way. Photos and videos attach directly from your library. Documents, spreadsheets, and PDFs come from the Files app or iCloud Drive. If the file is stored in an app like Google Drive or Dropbox, you'll need to open that app first, find the file, and use its share button to send it through Mail.

Key Takeaways

  • Tap and hold in the message body while composing an email, then select Add Attachment to insert files from your phone.
  • Photos and videos attach from your library; documents and PDFs come from the Files app or iCloud Drive.
  • Files stored in Google Drive, Dropbox, or other cloud apps must be shared through those apps' own share menus.
  • Large files may fail to send — check your email provider's size limit, which is usually 20 to 25 MB per message.
  • If the attachment button doesn't appear, swipe up from the keyboard to reveal the full formatting toolbar.

Attaching photos and videos from your library

Photos and videos are the easiest files to attach because they live in the Photos app, which Mail can access directly. Start composing your email, then tap and hold in the message body. Select Add Attachment, and your photo library opens. Tap the photo or video you want, then tap Add. You can add multiple files by tapping each one before tapping Add.

If you want to attach a photo that's not in your library yet, take it first, then return to your email draft. The photo will appear in your recent photos and be ready to attach. If you've already sent the email and want to add a photo, you'll need to start over — iPhone Mail doesn't let you edit attachments after you've sent a message.

Attaching documents and PDFs from Files or iCloud Drive

Documents, spreadsheets, and PDFs live in the Files app or iCloud Drive, not in your photo library. Start composing your email, then tap and hold in the message body and select Add Attachment. Instead of your photo library, you'll see a file browser. Navigate to the folder where your document is stored — it might be in iCloud Drive, On My iPhone, or a cloud service you've connected.

Tap the file you want, then tap Add. If you can't find the file, make sure you're looking in the right location. Files stored only in an app (like Word or Google Docs) won't show up in the Files app unless you've saved them to iCloud Drive or On My iPhone first. If the file is in a cloud service like OneDrive or Google Drive, open that app instead and use its share button to send the file through Mail.

Sharing files from Google Drive, Dropbox, and other apps

If your file is stored in Google Drive, Dropbox, OneDrive, or another cloud app, you can't attach it directly from Mail. Instead, open the cloud app, find the file, and tap the share button (usually three dots or a square with an arrow). Select Mail or Send via Email from the menu. This opens a new email in Mail with the file already attached or linked.

Some cloud apps attach the file itself; others insert a link that the recipient can click to download. Check which method your app uses before sending. If you need the recipient to have their own copy of the file rather than just a link, ask your cloud app's support whether it attaches or links.

Why your attachment won't send and how to fix it

The most common reason an email with an attachment won't send is that the file is too large. Most email providers limit attachments to 20 to 25 MB per message. If your file is bigger, compress it first. For photos, Mail can automatically compress them — when you tap Send, a menu may ask whether you want to send at full size or reduced size. Choose reduced size if the recipient doesn't need the original quality.

For documents and videos, you'll need to compress them yourself before attaching. On iPhone, you can zip files using the Files app: tap and hold the file, select Compress, then attach the zipped version. If the file is still too large after compression, consider uploading it to Google Drive or Dropbox and sending a link instead.

Another reason an email might not send is a poor internet connection. Make sure you're connected to Wi-Fi or cellular data before tapping Send. If the email sits in your Outbox for more than a few minutes, try closing Mail completely and reopening it. If it still won't send, delete the email, check your connection, and try again with a smaller attachment.

Attaching files when replying to an email

You can attach files when you reply to an email the same way you attach them to a new message. Tap the reply button, write your response, then tap and hold in the message body and select Add Attachment. The process is identical to composing a new email.

One difference: if you're replying to an email that already has an attachment, that attachment won't automatically be included in your reply. You'll need to add it manually if you want to send it back to the sender. This prevents you from accidentally sending the same file twice.

Using the Files app to organize attachments before sending

If you attach files regularly, organizing them in the Files app first makes the process faster. Create a folder called "Email Files" or something similar, and move documents you plan to send there. When you compose an email and tap Add Attachment, navigate to that folder — you'll find your files in seconds instead of hunting through multiple locations.

You can also create folders for different projects or recipients. For example, a folder for "Client Reports" or "Family Photos" keeps files grouped by purpose. This is especially useful if you send the same types of files repeatedly. The Files app syncs across your iPhone, iPad, and Mac, so files you organize on one device appear organized on the others.

Frequently Asked Questions

Can I attach a file that's inside another app, like a document in Word or Google Docs?

Not directly from Mail. You need to open the app where the file is stored, find the file, and use that app's share button to send it through Mail. Some apps let you save a copy to iCloud Drive or Files first, which you can then attach normally.

What's the size limit for email attachments on iPhone?

Most email providers allow 20 to 25 MB per message, though this varies. Check your email provider's website if you're unsure. If your file is larger, compress it or upload it to a cloud service and send a link instead.

Why does my attachment show as a link instead of a file?

Some email providers and cloud apps send attachments as links for security or storage reasons. This is normal. The recipient can still access the file by clicking the link, though they may need to sign in to your cloud service first.

Can I attach multiple files at once?

Yes. When you tap Add Attachment, select the first file, then tap Add. Repeat the process for each additional file. You can add as many files as you want, as long as the total size doesn't exceed your email provider's limit.

What happens if I close Mail before I send an email with an attachment?

Mail saves your draft automatically. When you reopen Mail, your draft appears in the Drafts folder with the attachment still there. You can finish writing and send it whenever you're ready.