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How to Attach Files to an Email or SMS
Upload and send files directly from the Conversations tab using the attachment icon or drag-and-drop—plus learn SMS/MMS limits and email best practices.
Sharing Files Without Leaving the Conversation
You may need to send documents, images, or files, but switching between tools slows down communication.
Attachments let you send files directly inside conversations so everything stays connected to the contact.
Without a clear process, files can get lost or disconnected from the conversation history.
This guide will show you how to attach and send files so your communication stays organized and efficient.
Once you understand how attachments work, follow the steps below to upload files, manage limits, and send them through email or SMS inside your BizStackPro account.
What This Helps You Do
Attachments make conversations faster and clearer—send screenshots, PDFs, images, or documents right inside Conversations without switching tools.
Follow along: Open Conversations → choose a contact → look for the paperclip (attachment) icon near the message box.
How to Attach and Send Files
- Open Conversations: Go to the Conversations tab in BizStackPro.
- Select the contact: Click the contact thread you want to message.
- Attach your file:
- Drag & drop: Drop the file directly into the message composer area.
- Use the clip icon: Click the paperclip and select a file (or choose from the Media Library if available).
- Review the message: Confirm you’re sending via the correct channel (Email vs SMS/MMS) and verify the recipient details.
- Send: Click send. Your file will be included with the message (subject to limits).
Pro tip: If you’re sending something time-sensitive (like an invoice or form), mention what the attachment is in the message text so the contact knows to open it.
Attachment Limits and Rules
- SMS/MMS size limit: The total size of your message text + all attachments must be under 5 MB, and MMS must be enabled.
- Multiple attachments (SMS/MMS): You can send up to 10 attachments as long as the combined size remains under the limit.
- Toll-Free MMS: Toll-Free numbers can support MMS and attachments (carrier-dependent), commonly up to 5 MB.
- Email large files: If an email attachment exceeds common size thresholds (often 20–25 MB), it may be stored/linked via the Media Library instead of attached directly.
Best practice: For SMS/MMS, compress images and keep videos short to avoid carrier rejections and slow delivery.
Video Thumbnails and Media Library Behavior
When you upload a video through the Media Library for email, BizStackPro can generate a clickable GIF thumbnail that embeds into the email—helpful for improving engagement and click-throughs.
- Emails: Videos can display as a clickable preview thumbnail (GIF) linked to the hosted media.
- Large files: Media Library links help you avoid external hosting and size-related send failures.
Want cleaner conversations with attachments built in?
BizStackPro makes it easy to message, share files, and keep everything tied to the contact record—so your team stays organized and responsive.
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Frequently Asked Questions
How can I attach a file to an email or SMS message?
Open Conversations, select the contact, then drag-and-drop the file into the composer or click the paperclip to attach it.
What is the maximum file size I can send via SMS?
The total size of the message text and attachments must be under 5 MB, and MMS must be enabled.
Can I send multiple attachments in one SMS?
Yes—up to 10 attachments, as long as the total size stays under 5 MB.
Do Toll-Free numbers support attachments via MMS?
Yes. Toll-Free numbers can support MMS and file sending, typically up to 5 MB depending on the carrier.
What happens when I upload a video attachment in an email?
If uploaded through the Media Library, a clickable GIF thumbnail can be generated and embedded in the email.
Share Files Faster—Right Inside Conversations
Stop hunting through email threads and DMs. Keep attachments tied to the contact record so you can follow up faster and stay organized.
More context. Less chaos.
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