For G Suite.
For Office 365.
What are the maximum sizes of email for both sending and receiving?
You can send and receive messages up to 25MB with Gmail.
You can send and receive messages up to 25MB with Office365.
Transfer encoding is automatically added, thus file size will increase. There is no problem if you suppose 1.3 - 1.4 times the original size.
*The receiver may limit the maximum size. Please keep that in mind.
HENNGE mail service also allows the limitation of Gmail / Office365 and considers the conditions above.
*You can change the limitation stricter (for example up to 3MB).
If you wish us to do that, please contact our support.