Using cloud storage share links from platforms like Google Drive or Dropbox instead of file attachments reduces email size, bypasses provider strict size ceilings, and lowers spam filter triggers tied to binary code scanning.
💡 This isn't an Alvéya restriction — it comes down to how Gmail, Outlook/Hotmail and other major providers now handle email. As part of their ongoing crackdown on spam and the risk of viruses being sent as attachments, these providers scan, throttle, or flag file attachments far more aggressively than they used to. Sending links instead keeps your emails landing safely in the inbox.
Why Links Improve Deliverability
Size reduction: Emails stay small because they only contain text and a URL, avoiding structural bloat.
Spam filter evasion: Mail servers scan raw file attachments for hidden malware or macro risks; clean cloud links bypass these direct blocks.
No hard bounces: Large files often trigger hard bounces when they exceed a recipient mailbox's maximum capacity (10 MB to 25 MB)
Videos: Host on YouTube or Vimeo, Then Link
The same principle applies to video. Never attach a video file directly to an email — video files are large, get blocked or stripped by most providers, and are a common trigger for spam filters. Instead, upload the video to YouTube or Vimeo (as unlisted or private if it shouldn't be publicly discoverable) and share the link in your email body.
Better deliverability: A short text link keeps the email lightweight, so it's far less likely to be blocked, throttled, or marked as spam.
Faster loading: Recipients click through to a platform built for streaming video, rather than waiting on a slow download or a file that may not even open on their device.
Works everywhere: YouTube and Vimeo links play on any device or email client, with no compatibility issues.
Comparison of Methods
Feature | Direct File Attachment | Cloud Share Link |
Email Size | Large (increases with file weight) | Minimal (text and URL only) |
Spam Risk | High (frequently flagged for malware/size) | Low (trusted domain URLs) |
Post-Send Control | None (cannot edit or retract sent files) | High (can update, revoke, or expire links) |
Version Control | Poor (creates multiple duplicate files) | Excellent (single live document source) |
Best Practices for Link Sharing
Set correct permissions: Adjust general access settings to "Viewer" so recipients cannot accidentally alter your master files.
Use descriptive anchor text: Avoid raw URLs; instead, hyperlink clear text like Project Report PDF to provide context for the user and security filters.
Manage link lifecycle: Set expiration dates or password protection on sensitive files using your cloud provider's advanced settings.