You’re trying to send an important document to a client in Trois-Rivieres, and your email bounces right back with an error: attachment too large. It happens to everyone, from individuals to small businesses across Mauricie sharing plans, videos, high-resolution photos, or big presentations.

The good news is you no longer need to split a file into pieces or compress it until it falls apart. There are several free, reliable ways to send a large file without clogging up the recipient’s inbox. Here are the methods we recommend to our clients, from the simplest to the most secure.

1. Why your email rejects large files

Almost every email provider caps attachment size. Outlook and Microsoft 365 generally block attachments over 25 MB, and Gmail applies the same 25 MB limit. Even if your provider allowed more, there’s no guarantee the recipient’s inbox would accept it. The result: the message bounces, or it gets stuck and never arrives.

A few reasons behind these limits:

• An attachment gets encoded for transport, which inflates its actual size by roughly 30% during sending.
• Email servers aren’t built to store large files the way cloud storage services are.
• Large files slow down the whole chain and raise the risk of spam filtering.

The solution isn’t to force the attachment through, it’s to share a link to the file hosted elsewhere. That’s exactly what the methods below do.

2. OneDrive: the simplest method if you have Microsoft 365

If your business already runs on Microsoft 365, you have everything you need. OneDrive lets you upload a file and simply send a link, no matter the size. The recipient clicks, downloads, and your inbox stays light.

To send a large file with OneDrive:

1. Drag your file into OneDrive (via File Explorer or the website).
2. Right-click the file and choose Share.
3. Set the permissions (view only or edit) and the link’s expiry date.
4. Copy the link and paste it into your Outlook email.

You can even attach a OneDrive file directly from Outlook: instead of sending a copy, Outlook offers to insert a shared link. It’s faster and cleaner. If your business isn’t set up properly on Microsoft 365 yet, our IT services for small businesses can get everything connected correctly, security included.

3. SharePoint and Teams for team sharing

When several people need access to the same large file, individual links quickly turn into a mess. SharePoint and Microsoft Teams are built exactly for this: you drop the file into a shared library, and the whole team accesses the same spot, with a single up-to-date version.

The benefits for a small business in Quebec or Mauricie:

• No more multiple versions of the same document floating around by email.
• Access rights managed by person or group.
• Revision history is kept, which helps if something goes wrong.
• External clients can get a protected link without access to anything else.

This is the ideal method for recurring files (catalogs, plans, templates) rather than a one-off send. Planning your cloud environment properly makes a big difference here.

4. Temporary transfer services (no account needed)

Need to send one large file to someone and don’t feel like opening an account? Temporary transfer services are made for that. You drop the file in, get a link, and the recipient downloads it before the link expires (usually after a few days).

These tools are handy for a one-time send, like a promotional video or a batch of photos. A few precautions, though:

• Avoid them for confidential documents (contracts, client files, personal information).
• Check whether the service offers password protection on the link.
• Remember the file passes through a third-party server, often outside Canada.

For occasional, non-sensitive use, it’s quick and effective. For business data, stick to methods 2, 3, and 6.

5. Compress the file before sending

Sometimes your file just barely exceeds the limit. In that case, compression can be enough, letting you send a large file directly as an attachment without a link.

On Windows 11, it’s built in:

1. Select the file or files to compress.
2. Right-click, then choose Compress to ZIP file.
3. A lighter .zip file appears, ready to attach to your email.

Compression works well for Office documents, PDFs, and text files. It won’t do much for photos, videos, or music, since those are already compressed. For those formats, sharing a link is the better route. One more tip: for an oversized PDF, a dedicated PDF compression tool often shrinks the size without hurting readability.

6. Sharing securely: what to check

Sending a large file is one thing. Sending it securely is another, especially when it contains client information or business data. The Canadian Centre for Cyber Security recommends a few simple habits for file sharing.

• Protect the link with a password whenever possible, and send that password through a different channel (text message, phone call).
• Limit how long the link stays valid so it doesn’t remain accessible indefinitely.
• Restrict permissions to view-only if the recipient doesn’t need to edit the file.
• Favor Canadian-based hosting or hosting your business controls for sensitive data, which also helps with Quebec’s Law 25.

For a small business, the best habit is to centralize sharing in an environment you control rather than scatter files across free services. If you’re not sure about your current setup, talk to our team: a quick look can prevent a lot of leaks.

Frequently asked questions

What’s the maximum size for an email attachment?

Most providers, including Outlook, Microsoft 365, and Gmail, cap attachments at around 25 MB. Beyond that, the email is likely to bounce. The best solution is to share a link to the file hosted in OneDrive, SharePoint, or another cloud service.

How do I send a video that’s too large by email?

Videos almost always exceed the attachment limit. Upload the video to OneDrive or Google Drive, then send the sharing link. For a one-time, non-confidential send, a temporary transfer service also works well.

Is it safe to use a free transfer service for confidential documents?

For sensitive documents, it’s best to avoid free services, since the file passes through a third-party server, often outside Canada. Favor a password-protected share in an environment you control, like SharePoint or a business vault.

Need help sharing files in Trois-Rivieres?

Sending a large file properly is simple when your environment is set up right, and a headache when it isn’t. Whether you’re in Trois-Rivieres, elsewhere in Mauricie, or anywhere in Quebec, our team can set up fast, secure file sharing, connected to Microsoft 365 and compliant with your obligations. Check out our IT services for small businesses or contact us to talk it through, no strings attached.