'send the first message' is correct and usable in written English.
You can use it to indicate that someone should initiate a conversation. For example: "Let's start our project by having one of us send the first message."
In the second message, Everypath's communications director, Giselle Bisson, explained that an employee "working long hours on our launch" had meant to send the first message only to the executive staff -- but accidentally copied it to the entire invitation list for the company's coming-out party.
Boys are not allowed to send the first message on Bumble.
"By giving our female users the ability to exclusively send the first message if and when they want to, My Move provides women the autonomy to choose how to engage with their matches and empowers them to control their experiences.
The biggest feature of CMB's premium tier is Activity Reports, which show stats on a user's profile about percentage of times they engage in chats with connections, percentage of the time they send the first message, whether or not they've been active in the last 72 hours, and a marker for how long it usually takes that person to respond to messages.
So you decide to send the first message, "Hey, how's it going?
Morgan googled Bumble and quickly found it's the so-called "feminist Tinder" where only women can send the first message.
In the same way, when a node receives beacons notifying the presence of higher-priority messages than messages that it will send (the first messages in its queues), it freezes its transmission.
The hall sends the first message: we are of the people.
In 1844 the line was completed, and on May 24 he sent the first message, "What hath God wrought".
FORTY years ago this month American academics sent the first message over the ARPANET, a military network that was the precursor of today's internet.
Several staff members joined Mr. O'Brien at home when he sent the first message, which said, "Hey Internet: I'm headed to your town".
