What do you mean by "emails would break"? They would be rejected by Googles MX servers, and the sending server would relay a bounce message to the sender explaining the problem... That is just a normal function of email.
All MX servers have arbitrary limits. Those limits can be increased/reduced at will without "breaking email"
It is already a common case that people send emails which are larger than the receiving system is willing to accept and are therefore rejected. They then receive a bounce and make alternative arrangements for transferring the file.
Comments
What do you mean by "emails would break"? They would be rejected by Googles MX servers, and the sending server would relay a bounce message to the sender explaining the problem... That is just a normal function of email.
All MX servers have arbitrary limits. Those limits can be increased/reduced at will without "breaking email"
It is already a common case that people send emails which are larger than the receiving system is willing to accept and are therefore rejected. They then receive a bounce and make alternative arrangements for transferring the file.
The pure market share could have been a motivating factor for parent post. I assume that things behave differently when you're the #1 at something.
However, this seems arbitrary enough to not have that effect.