We have an Exchange 2013 infrastucture . 2 Edge servers , 2 CAS and 2 MBX . Infront of all this we use an antispam cloud service. Filtering is disabled in Edge Servers.
I have a strange problem with incoming attachments from a bank. Everyday they send statement files as a zip file. But exchange remove the attachment and placed a txt file . So the file name is statement.zip and exchange rename it to statement.zip.txt . In OWA also i see a message that says " An attachment was removed from this email message
because the attachment may pose a security risk "
Is there a way to bypass this ? I have also whitelist the user in our cloud antispam platform but the problem continues .