The limits I have seen are by emails, not attachments. There is a 10mb limit on an email on most servers. However, this would get stuck in the outbox.

On March 21, 2016 7:54:07 PM EDT, Gene Wirchenko genew@telus.net wrote:

At 16:00 2016-03-20, Sytze de Boer sytze.kiss@gmail.com wrote:

...

When I look at this client's Sent folder in Outlook, I can see (about)

20

...

emails were sent WITH attachments, followed by (approx) 10 that

DIDN'T.

 Is there a limit on how many MB of attachments can be sent in a 

time period?

[snip]

Sincerely,

Gene Wirchenko