Attachments in Emails

Maximum Attachment Size:

Zoho Mail provides you a wide set of choices to add attachments to your email. The maximum size of attachment is based on the subscription plan for the organization users and for personal users, the maximum email size including all attachments is 20MB. However in case of organization users, the administrators can add further restrictions to the email size, using Mail Policy.

Generally when you add attachments to your emails, the files get MIME encoded as per the RFC standards, to make it readable by the recipients, irrespective of the providers. The MIME encoding, makes the files larger by upto 30%. A 15MB file on your desktop, may appear to be a 20MB attachment when sent via email. 

Attach files from your system:

  1. Open the editor to draft the email. 
  2. Click the 'Attach' icon to choose to add a file from the desktop or other cloud services.
  3. Select 'Attach from Desktop' to select and browse files from your desktop. 
  4. You can choose multiple files using Ctrl/ Shift keys and based on your browser support.

Drag and Drop Attachments*:

  1. Open the editor to draft the email. 
  2. Select the attachment files in your desktop.
  3. Drag them into the Composer window.
  4. A drop area with the text 'Drop files here' will appear.
  5. Drop the dragged files inside the box.
  6. The files will be added as attachments to the email. 

The Attachment Drag and drop feature and attach multiple files feature are supported in the Firefox 3.6 and above, Chrome 6.0 and above only.

Attach files from Zoho Mail/ Zoho Docs

Apart from attaching the email from desktop, you can also attch the emails from Zoho Docs or other cloud storage services. Click 'Attach from Cloud' option in the Attachment, to choose the provider and the file respectively.  Zoho Mail being a cloud email, supports other cloud storage services like DropBox, Google Drive, One Drive, Box and even Evernote. 

 Attach files from My Attachments:

  1. The 'My Attachments' section has the files that you have already sent/ received as attachments in Zoho Mail. 
  2. Zoho Mail allows you to browse the existing attachments using the 'My Attachments' section.
  3. You can look out and locate the exact attachment using the Filters in the right top.

Attach files from Zoho Docs:

  1. Zoho Docs, is a part of Zoho Apps and allows you to save your files in the cloud. 
  2. You can use the 'Attach from Zoho Docs' to find and attach a file from the files saved in your Zoho Docs.
  3. The files are automatically classified as documents, presentations, spreadsheets and so on.
  4. You can also attach the files, that are shared with you via Zoho Docs. 
  5. Select the files you want to attach to the email and click Attach.
  6. The selected files will be added as attachments to your email. 
  7. If the combined size of the attachments exceed the allowed limit, you will get an error message. 

 Attach files from Cloud Storage Services:

You can choose the attachments from Dropbox, Google Drive, One Drive, Box and even EverNote apart from your desktop files and the files in Zoho Docs. 

  1. In the 'Attach from Cloud', select the Cloud Storage Service, in which you have the files to be attached. The cloud storage services currently supported are
    1. Google Drive
    2. DropBox
    3. One Drive
    4. Box
    5. EverNote

  2. When you use for the first time, you need to 'Authenticate' and allow Zoho Mail to browse and attach files from the service you choose.
  3. Once successfully authenticated, you can select the files listed in the Cloud Storage.   
  4. You can select multiple files and click Attach to attach them to your email. 

Similarly, you can also Save the attachments in your incoming emails, directly to your Cloud Storage accounts. Refer the help page 'Saving/ Viewing attachments' page for details.


  • If the mail size exceeds the size defined by the mail policy, an alert will be displayed and the message will not be sent.