Hi,
Do you want to send an email to the vendor when one of his product is published ?
It could be done using a small plugin.
Be catching the trigger "onBeforeProductUpdate" and "onAfterProductUpdate", you can know when a product is beeing modified.
At this moment, you can load the product and check the vendor (and the previous product status).
If the product publish status changed, if it is a vendor product and if the product has been modified from the backend ; the plugin could send an email to the vendor.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.