On a computer (any email program)
Open your email and start a new message
Click Compose in Gmail, New message in Outlook, or the pencil icon in Yahoo Mail or Apple Mail. A blank email window appears.
Fill in the To and Subject lines
Type the person’s email address in the To box and a short summary in the Subject line. Then click once inside the big box for the message and write a sentence or two.
Click the paperclip icon
Somewhere near the bottom of the email window there’s a little paperclip icon — that’s the “attach file” button. Click it. A file picker will open.
Find and double-click the PDF
Browse to the folder where you saved the PDF (usually Downloads or Documents) and double-click the file. You’ll see it appear in the email as a little attachment, with its file name and size.
Click Send
Blue button in the corner of the email window. The email — PDF and all — is on its way.
On an iPhone or iPad
Open the PDF first
Open the PDF in the Files app, Mail, or wherever it lives.
Tap the Share button, then Mail
The Share button (square with up-arrow) shows a list of apps. Tap Mail. A new email opens with the PDF already attached.
Fill in and send
Add the recipient’s email, a subject, and a short note. Then tap the blue up-arrow in the top-right corner to send.
On an Android phone
Open Files and find the PDF
Open the Files (or My Files) app and tap Downloads.
Long-press the PDF
Hold your finger on the file name for about one second. A checkmark appears beside it.
Tap Share and choose Gmail
Tap Share (small arrow icon), then pick Gmail from the list. A new email opens with the PDF attached. Fill it out and tap the paper-airplane button to send.
What’s next
Sent successfully? You can go back and save the web page of the confirmation as a PDF to keep proof you sent it.