Today there are colleagues react when send a Word file，Then the subject received an "undelivered:」，Content is explained “552 MS-Office file containing VBA marcos found inside of the email”，After testing a few times back and forth，To confirm that the firewall is blocking Sonicwall。
Because Sonicwall's Gateway Anti-Virus blocked by default Office file containing VBA function file，So long as this is set to take off。
1.「Security Services」-「Gateway Anti-Virus」，Under "SMTP" click on "Settings"。
2.Uncheck “Restrict Transfer of MS-Office type files containing macros (VBA 5 and above)” To。
【參考連結】
- Gateway Anti-Virus (GAVE) Blocking VBA Macro Files When SMTP and POP Inspection is Disabled on SonicO | SonicWall
