What's the maximum size of e-mails? 5 MB? 10 MB?

Is the provided answer in any known language

            We can expert The Qouita Shud ne 1 GB 2 Gb 

There are several questions :

1. maximum size of a mail : 25 Mb
2. maximum size of a mailbox 1Gb
3. is the space shared between the 5 mailbox yes
4. maximum size for all mailboxes 1Gb (per domain name)

from http://wiki.gandi.net/en/mail/email-mailboxes-and-forwarding-addresses