"hold off on sending" is correct and usable in written English. You can use it when you want to suggest or advise someone to delay or postpone sending something. For example: "We should hold off on sending out marketing emails until we launch the new website."
According to The Associated Press, the media watchdog Reporters Without Borders initially advised media outlets that "there is no other solution" but to hold off on sending female journalists to Egypt.
If your resume says "Expected Graduation: May 2016," maybe hold off on sending it for now.
The company was then able to hold off on sending full teams to the PNG site until close to launch.
"With the integration of Life360's Drive Mode, we are helping to keep drivers' attention on the road by letting their loved ones know that they are behind the wheel, encouraging family members and friends to hold off on sending texts," said Julius Marchwicki, Ford connected services product manager, in a statement.
Also (though I greatly appreciate it) please hold off on sending thank yous, just want to limit it to information/links or I'll be overloaded.
HOLD UP, WAIT A MINUTE A lawsuit has prompted the Trump Voter Fraud Commission to tell states to hold off on sending in voter data.
They, of course, die defending the Alamo as Sam Houston, for painful strategic reasons, holds off on sending reinforcements.
Consider holding off on sending it after your initial proofread if it is not time-sensitive.
When I got home, I wanted to relax for a while, so I held off on sending out résumés.
Goldberg recommends that managers consider holding off on sending emails to allow their employees to unplug on the weekend -- which smart bosses know can actually boost productivity.
People who are self-employed, such as contract workers or freelancers, should consider holding off on sending invoices so the payments come in 2018.
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia