emailing an encrypted copy of a tax return

[wba cpa]

I tried to email an encrypted copy of a tax return to a client.  Email failed .  No explanation given as to why?

Is there a limit to file size?  I sent the entire client copy which was 80+ pages.

[Just-Lisa-Now-]

some email providers DO have a file size limit.
You may want to find an affordable portal with no file size limit for sending files to clients securely. I use Encyro.