Multiple userIds in emailUser

I want to make a “Follow” function on my custom forum. I want to use a database with every following user in it, which the wixUsers.emailUser function will send an email to once a new post is created.

How can I send an email to all users in a database (and filtered, so it only sends the email to the followers of that category)?

During Gina’s first week at Casella and North, she had been sent to take a class on the IBM Selectric Typewriter. That she had used it at her prior job didn’t seem to matter; everyone had to take the three-day course. Also attending the school that week had been Kellie. She of course was also quite familiar with the office machine, having been using it for years, but had signed herself up for additional training on the new Magnetic Card Selectric Composer that was just coming into use.

During the half week at the school, Gina found the older woman to be, not only friendly, but also a fountain of information about the company and the people who worked there. Nothing derogatory, of course, well, not too much so, but just things she thought it would be helpful for the younger woman to know.

They had lunch every day, which made Gina a bit self-conscious since Kellie always insisted on picking up the check. A situation the younger woman tried to rectify on the last day, when she practically grabbed the check out of the server’s hand, only to pale when she saw that their single meal cost more than her lunch budget for the week, and that was without a tip.

“Is something wrong?” Kellie asked when she saw the look on Gina’s face.

“I didn’t … I mean, it’s so much,” Gina said with obvious embarrassment.

“So what, the company’s paying for it,” Kellie offered, confused by Gina’s reaction to the bill.

“What?”

“The company pays for your lunch when you go to class,” Kellie expanded. “After all, coming here is a requirement of the job. Didn’t Joan tell you that?”

Gina shook her head no.

“Then I’m also guessing that she didn’t tell you that you can also put in for travel expenses,” Kellie said, having no doubt as to the answer. “A train token might only be seventy-five cents, but it’s still an extra four fifty in your pocket at the end of the week.”

Kellie knew well the game the office manager was playing because she’d done it before. She deliberately didn’t tell new employees that they would be reimbursed for lunch and travel, knowing full well that, even if they found out about it later, few would’ve wanted to get on her bad side and put in for it. That gave her more petty cash to dole out to her favorites, those supplicants willing to kiss her ass and tell her how great she was.
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Thankfully, executive secretaries didn’t fall within Joan’s province so Kellie was free to tell the stuck-up bitch to go fuck herself, which she had done on more than one occasion. This time, however, she decided to forego herself the pleasure lest it come back to hurt Gina. Instead, she suggested to Gina that she again let her pay for lunch and that she’d not only put in for reimbursements for the meals, she’d add on Gina’s travel costs to her own, letting the younger girl get back what she had spent.

“In fact, why don’t I just give it to you now to save time?” Kellie said, reaching into her purse and taking out a five-dollar bill. “I’ll just round it up when I put in the paperwork,” she added before Gina could start to look in her own purse for change.

Kellie couldn’t remember the last time she’d actually put in for petty cash, but Gina didn’t need to know that. Also, in her purse was a company credit card, with which she could charge pretty much anything up to five hundred dollars before anyone would have the nerve to inquire about it. She’d never abused it, taking that fact as a sign of the trust Mr. Bernstein had in her.

“I want you to promise me that, in the future, if you have any questions about anything in the company, you’ll come and ask me about them,” Kellie told Gina after checking her watch and noting that they had to get back to their respective classes.

“I promise,” Gina said, thankful that she had at least made one new friend at the company.

-=-=-=–=-=-=-

“Kellie?” Gina said in surprise as the older woman reached for another small stack of envelopes to feed into the machine.

Pausing in her task, Kellie turned her head in Gina’s direction, a smile appearing as she recognized her. She switched off the machine, allowing her to safely turn her attention away from it.

“Gina, what are you doing here?” Kellie asked.

“I was just about to ask you the same thing,” Gina countered.

“Well, it’s Friday and, snow or no snow, the Bernstein Bulletin has to go out,” Kellie said, holding the stack of envelopes in her hand a bit higher for emphasis.
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The Bernstein Bulletin, as Gina had learned soon after she’d started at Casella and North, was a financial newsletter that Abraham Bernstein put out each week and that clients paid a great deal of money to receive. With over two thousand people on the mailing list, it brought the company a significant income every week.

“But why are you mailing them out?” Gina further inquired. “Isn’t that what the mailroom clerks are for?”

“One of the government projections that Mr. Bernstein wanted to include in this week’s letter was delayed, so I didn’t get to print it out until after four,” Kellie explained. “Since I can run the machines down here as well as they can, I didn’t see any reason why they needed to hang around and wait for it. I just told them to leave me the key to the postage meter and I’d drop it in the lock box when I was done.”

Even with her limited experience, Gina knew there was much more to it than that. The average bulletin ran five pages, and the Xerox copier, which thankfully could sort the pages into the proper order, could only make twenty-five copies at a time. Then the pages needed to be folded and fitted into pre-addressed envelopes. The folding was done by machine but they had to be stuffed into the envelopes by hand. Finally, they were run through the meter which printed the proper postage on them and sealed the envelopes. From there it was just a matter of dropping them into the open mail sack reserved for just that purpose.

Gina smiled, thinking that had been an extremely nice thing for her friend to have done. Most anyone else, and to be honest, considering the circumstances, she would probably have to include herself, would’ve just dropped the report and left it for the mail clerks to handle, storm or no storm.

“So, what are you still doing here?” Kellie then repeated. “I would’ve thought that, living all the way out in Queens, you’d have taken off hours ago.”

“No, such luck,” Gina replied. “They wanted someone here to answer phones and since I’m the low woman on the totem pole, here I am.”

“No one wanted to volunteer?” Kellie asked. “That’s surprising, I would’ve thought that Donna or Carol would’ve at least offered. After all, they share an apartment only a few blocks from here.”

“Excuse me, what?” Gina replied, surprised in her voice.

“Donna Walsh and Carol Briggs, you’ve met them, I’m sure, lovely girls.” Kellie continued. “One or both of them usually stays when there’s bad weather.”

“I don’t know them well but I’ve met them,” Gina replied, picturing the two thirty-something blondes in her mind, “but no one said anything about asking for volunteers. Joan just told me that I …”

“… that you were the one who had to stay,” Kellie said, completing the sentence.
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“Exactly.”

“She was supposed to ask for volunteers first,” Kellie added. “It was part of the memo from the partners.”

You have to store in your Categories collection an array of subscribers (it can also be a multi-reference field that connects to the PrivateMemebrsData collection).
Once a new post got published, you query the collection and get all the userIds (and the emails connected to them).
and you use Wix trigger emails or a third party email service to send an email to all these users.