When you reply to a long email thread in the new Outlook, Zivver shows a “too many attachments” error, or the security scan keeps running and never finishes. This happens even though you did not add any attachments yourself.

Cause

Zivver allows a maximum of 50 attachments per message. The new Outlook, unlike the classic Outlook, counts each inline or embedded signature image as a separate attachment. This includes images that corporate signature tools, such as Exclaimer, insert into messages.

A reply carries the signature images of all earlier messages in the thread. With every reply, the number of images grows until the message passes the limit of 50 attachments.

Solution

Choose the solution that fits your situation. Solutions 1 and 2 help the user right away. Solutions 3 and 4 prevent the problem from coming back.

Solution 1: Start a new message

1. Create a new message instead of replying to the long thread.
2. Copy the relevant text from the thread into the new message.
   Do not copy the earlier signatures. The new message then starts with a clean count.

Solution 2: Remove signature images from the quoted messages

1. Open the reply and scroll to the quoted earlier messages.
2. Select the signature images in the quoted messages and press Delete.
3. Send the message again.
   The message now carries fewer attachments.

Solution 3: Send from the classic Outlook

Does the user have access to the classic Outlook? Then send the reply from there. The classic Outlook does not count signature images in the same way.

Note

The Zivver Office Plugin in the classic Outlook has a less common variation of the same problem. On some long threads it adds attachments that were sent earlier again with every reply, not only signature images. The number of attachments can therefore also grow towards 50 with ordinary attachments. Use solution 1 for these threads as well.

Solution 4: Add the signature only to the newest message

Does your organization use a third-party signature tool? Check whether you can configure it to add the signature only to the newest message. It then no longer adds signatures to the quoted earlier messages of a thread.

Is the signature added by an Exchange mail flow rule? Then also see Signatures and disclaimers.

Still need help?

If the problem remains after these steps, contact Zivver Support and include this information in your request:

• Which Outlook does the affected user use: the new Outlook or the classic Outlook?
• Which signature tool does your organization use, if any?
• How many messages does the thread contain?
• Which steps from this page did you try, and what was the result?