To keep a useful email with a project’s files on your Mac, save the message from Apple Mail into the project folder, then add any important attachments separately. Choose a PDF when the record should be easy to read and share; choose Raw Message Source (.eml) when you want a message file that retains the original email data. These steps create a local copy and do not automatically delete or move the email in Mail.

Choose the format that fits the record

A PDF is convenient for reading, printing, or sharing as a document. In Mail, select the message and choose File > Export as PDF, then choose the project folder and a filename. Apple also documents File > Save As for saving messages as files in different formats. Rich Text Format retains formatting such as bold and italics; Plain Text does not. Raw Message Source saves one message as an .eml file. Apple’s guide to saving emails as files or PDFs

Use .eml when you want to keep a message as an email file rather than a document-style rendering. Apple says you can also save a message in .eml format by dragging it to the desktop. When you drag a conversation, its messages are saved as separate files. For a project record, give each file a clear name after saving it, such as 2026-10-15-Client-approval.eml; the date and subject in this example are a naming suggestion, not a field Apple inserts automatically.

Save the message into the project folder

  1. In Finder, open the folder where you keep the project’s documents. If a suitable folder does not exist, create one with a recognizable project name.

  2. In Mail, find and select the relevant message. Check that you have selected the individual email you need; if you need multiple messages from a conversation, select the messages you intend to preserve rather than assuming a single export contains the whole exchange.

  3. Choose File > Export as PDF for a readable PDF, or File > Save As and select a format. In the save dialog, navigate to the project folder, enter a descriptive filename, and save. If using Raw Message Source, Apple specifies that it saves a single message in .eml format.

  4. Open the project folder in Finder and confirm the saved file is there and has the expected name. For a PDF, open it to check that the visible message content is present. For .eml, open the file with a compatible mail app if you need to inspect it. This check is a practical safeguard, not a guarantee that the file captures every element exactly as it appeared online.

Include attachments as separate project files

Saving an email record and saving its attachments are separate actions. To keep the documents that came with a message, move the pointer over the message header, click the attachment button, then click an attachment or choose Save All and select the project folder. Apple also documents selecting a message and choosing File > Save Attachments. Apple’s guide to saving Mail attachments

Use the original attachment files when the project will need to work with them—for example, to edit a spreadsheet or review a signed PDF. Avoid renaming an attachment in a way that obscures its type; retain the extension and, if helpful, add a short project-specific prefix. When you save more than one item, inspect the folder afterward to make sure the files you meant to keep are present.

Keep the original email and understand the limits

Exporting a message as a file or PDF makes a copy; it is not the same as moving the message out of Mail. If you want Mail itself to remain the searchable source, leave the original message in its mailbox. If you want a larger Mail archive, Apple’s mailbox export creates .mbox packages through Mailbox > Export Mailbox. That is intended for exporting mailboxes, rather than saving one email alongside a project’s ordinary files. Apple’s mailbox import and export guide

A local file is only as durable as the storage and backup practices for that folder. Saving a PDF does not make the email content editable or preserve the original as a message file; saving .eml does not itself provide a tidy document for every recipient or app. For a compact project record, keep the email in the format that suits later use, add necessary attachments, and verify the saved files before relying on the folder.

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