One way to mitigate this problem is to upload attachments on cloud drives and send the link to the recipient through email.
On trying to do the same, email servers may give an error stating The attachment size exceeds the allowable limit or The file you’re attaching is bigger that the server allows – Or then the email simply won’t get sent or received. Usually, any email service does not allow sending files larger than a few MB’s in size. A known issue while sending files through email is the limit on the size of the attachments.