If you are using muti profile,for example,profile101 for company B,  default profile for all other companies.

Asynchronous Processing (CHECKED)
Profile101
Message Size ===> 26214400 ===>Action: Reject
Maximum "Global" size ==> 52428800

If someone send an email to company B with size more than 25MB and less than 50MB,the email will be received and disregard,but the main problem is no log to record this email is received and disregard. The sender gets email well delivered,but the recipient does not receive it at all,you can not find it at good/spams at all, no error message.

If someone is sending files for bidding,the sender show delivered successful,the company B did not receive it at all and no notice at all,then the sender missed the bidding opportunity,it will cause much trouble.