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How to add attachments to emails

How to Share Files in Emails Without Hurting Deliverability!

Learning Objective

By the end of this tutorial, you’ll know how to share a file in a lemlist email step using a tracked link (instead of attaching the file), so your campaigns stay deliverable and measurable.


Why This Matters

Traditional email attachments can reduce deliverability because they increase email size and can trigger spam filters. Sharing a file via a link keeps messages lightweight and lets you track engagement (who clicked).


Prerequisites

  • You already have a campaign/sequence with at least one Email step.

  • You have the file ready on your computer (PDF, image, etc.).


Core Lesson — Step-by-Step Workflow

Phase 1: Choose the right way to share your file

  1. Avoid attaching files directly to emails. Attachments can lower deliverability and increase the chance your message lands in spam.

  2. Share files using a link instead. You can either host the file yourself (your website/drive storage) or use lemlist’s file upload to generate a URL.

Phase 2: Upload your file in lemlist and insert the link

  1. Open your Sequence and click into the relevant Email step. In the message editor, click + Add, then choose Attach File. This opens the file upload flow for that email step.

    Click Add, then choose Attach File in the email step editor.

  2. Select the file from your computer. After the upload completes, confirm the generated file link appears in the email body, then place it next to your CTA or format it as needed in the message.

    The uploaded file link appears inside the email body after upload.

Using lemlist’s upload method also enables click tracking, so you can see which leads opened the file link.


Practical Application / Real-Life Example

If you’re sharing a one-pager or case study, add a short CTA instead of an attachment, for example:

  • “Here’s the 1-page overview:{{file_link}} — happy to answer questions if you’d like me to walk you through it.”

This keeps the email clean, improves deliverability, and makes it easy to track interest via clicks.


Troubleshooting & Pitfalls

Issue: My file is uploaded, but I don’t see a link in my email.

  • Root cause: The file was uploaded, but the generated URL wasn’t inserted into the message body.

  • Fix: Re-open the email step, use + AddAttach File again if needed, and make sure the generated URL appears in the email content where your CTA sits.

Issue: Clicks aren’t showing in stats.

  • Root cause: The link used is not the lemlist-generated file URL (for example, a direct hosted link elsewhere).

  • Fix: Use lemlist’s Attach File upload flow if you want click tracking inside lemlist.

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