Major changes in the area of Followed Actions were introduced in v10.0, including sending syslog as followed actions directly from the GW.
Although that the placeholders are configured wihtin the MX GUI, they are generated and sent by the GW.
For this reason the GW will make the best effort to generate similar information to the given placeholder, as if it was generated on the MX.
Meaning that according to the placeholder type, the information sent from the GW may be identical or similar to the information if it was sent from the MX.
Additionally, in some cases an empty string will be placed instead of the placeholder information.