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mailfloss Zapier integrationAutomate mailfloss with Zapier.

mailfloss Zapier integration: 1 trigger, 1 action and 0 searches. Zapier can send addresses to mailfloss for checking, and start a Zap once a verification run is done. The app is not premium, so a two-step Zap runs on the free plan.

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Overview

What the mailfloss Zapier integration does

mailfloss checks email addresses in bulk and keeps doing it without you, so bad addresses are caught before you write to them. On Zapier, it fits into a Zap, the automation you build there: an event in one app starts it, then one or more steps run every time. mailfloss can be the event, the step, or both in separate Zaps.

A list of failed addresses you can act on. Flossing Completed fires when a verification run ends, set to return the addresses that failed, and a spreadsheet step lists them for whoever cleans your contacts.

Every new address checked. A sign-up in your form tool starts a separate Zap, and Add Email hands the address to mailfloss, so it gets verified with the rest.

Results routed by outcome. The trigger can return all addresses, only those that passed, or only those that failed. One Zap per outcome keeps the good addresses and the bad ones on separate paths, each with its own destination.

What Zapier does not do here: there is no search step, so a Zap cannot ask mailfloss about one address on demand, and Add Email only hands an address over: that step returns no verdict. To act on verdicts, build a second Zap that starts from Flossing Completed. Before you choose a platform, see our n8n vs Zapier comparison.

Vocabulary

Zapier vocabulary in one minute

Seven words come back on this page. Here they are in plain terms.

Trigger
The event in an app that starts the Zap. For mailfloss, it is a verification run reaching its end.
Action
What the Zap does after it starts: the step that writes, sends or adds something. Add Email is one.
Task
The unit Zapier bills: one action that completes successfully. Your plan is a count of those per month.
Instant trigger
A trigger the app reports itself, calling Zapier the moment the event happens. Flossing Completed works this way.
Polling trigger
A trigger Zapier checks on a timer, asking the app for new items at a fixed interval. mailfloss has none.
Filter
A step that lets the Zap go on only when what arrived meets the condition you set, and stops it otherwise.
Connection
Your mailfloss account linked to Zapier once, then reused by every Zap step that talks to mailfloss.
Cost

What it really costs

The trigger costs nothing. A verification run reaching Zapier is free; you pay, in tasks, for what the Zap does next.

  • Free plan100 tasks per month
  • Premium appNo, available on the free plan
  • Cost of the trigger0 tasks
  • Free plan Zap size2 steps: one trigger, one action

Each successful action counts as one task; a failed one does not. Sending one address to mailfloss with Add Email is one task, and logging a result in a sheet is another. mailfloss is not a premium app, so the free plan (100 tasks a month) covers two-step Zaps: one trigger, one action. A filter or a second action makes a multi-step Zap, which needs a paid plan. The interval grid below applies to polling triggers only; it does not apply to Flossing Completed, which is instant.

Connect

Connect your mailfloss account

  1. 01

    Open the Apps page

    In your Zapier account, open Apps and click + Add connection. You need a mailfloss account first, with access to the addresses the Zap will touch, before you start.

  2. 02

    Pick mailfloss

    Type mailfloss in the search box of the dialog, choose it in the results, then click Add connection. That button opens the sign-in tab used in the last step.

  3. 03

    Sign in and grant access

    Sign in to mailfloss in the tab that opens and allow Zapier to use the account. Every Zap that adds addresses or waits for results reuses this connection.

First Zap

Your first Zap: list the addresses that failed

GoalWhen a mailfloss verification run ends, take the addresses that failed, check your condition, and add each one as a row in your sheet.

  1. 01

    Pick the trigger

    Create a Zap, choose mailfloss as the app and Flossing Completed as the event, then select your connection and set the trigger to return failed addresses.

  2. 02

    Test on real results

    Run the trigger test. Zapier brings back the three most recent items of the account, so you map the next steps on a real result rather than a blank example.

  3. 03

    Add the filter

    Click the plus icon, add Filter, then set the field, the rule and the value in Configure & test. Use a text rule on text fields.

  4. 04

    Log each address

    Add your spreadsheet step with its new-row action and map the address from the trigger into the right column of the sheet.

  5. 05

    Test and publish

    Test each step, read what came back, then click Publish. With a filter this is a multi-step Zap, so it needs a paid plan.

Triggers

mailfloss triggers

1 event starts a Zap when something happens in mailfloss, and one of them is instant: the app calls Zapier straight away, whatever your plan.

1

Flossing Completed

Instant trigger

In Zapier“Triggers when a flossing session is complete and emails are validated.”

Fires when mailfloss finishes a verification run and the addresses have been checked. It is the moment the verdicts become available to the rest of your tools.

How it fires
the app tells Zapier the moment it happens, so the Zap starts right away, whatever your plan
When to use it
send the failed addresses to a sheet for cleanup, or pass the ones that passed to the tool that writes to them.
Watch out
the Passed email verification field is required and returns all, passed or failed addresses; one Zap handles one of those choices, so two outcomes mean two Zaps.
Actions

mailfloss actions

mailfloss gives you 1 action. For each one: what it does for you, when to reach for it, and what to watch out for.

1

Add Email

Action

In Zapier“Add an email to mailfloss for email verification.”

Sends one address to mailfloss so it gets verified. This step hands back no verdict; on Zapier, the only operation that reports on finished checks is Flossing Completed, in a Zap of its own.

When to use it
check every new address captured in a form or another tool before anyone writes to it.
Watch out
the Email field is required, so the app that starts the Zap must carry an address on every item.
When it breaks

When it breaks

With one trigger and one action, the risks sit around loops and timing.

Here are the cases worth knowing before you publish. When a Zap stops for a reason you cannot place, see our Zapier troubleshooting guide.

  • The Zap feeds its own trigger

    A Zap started by Flossing Completed that sends addresses back with Add Email writes where its own trigger watches; if that leads to another run, the Zap fires again and burns tasks.

  • Old addresses stay unchecked

    A Zap only reacts to what happens after it is switched on. Addresses already in your other tools are not sent to mailfloss; that backlog is a separate job.

  • A big run floods the trigger

    A verification run on a large list can return a huge batch at once, and Zapier's flood protection can hold that batch back.

  • The wrong outcome reaches the Zap

    If the Passed email verification field is set to all, good and bad addresses arrive together. Pick passed or failed, or add a filter, before acting on them.
Need help

Need help automating mailfloss with Zapier?

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FAQ

mailfloss and Zapier: questions people ask

01Is the mailfloss Zapier integration free?
Yes, for a two-step Zap. mailfloss is not a premium app, so it runs on the free plan, which includes 100 tasks a month. The limit is the size of the Zap: one trigger and one action. Sending each failed address to a sheet fits that shape. Adding a filter first, or a second action that alerts someone, turns it into a multi-step Zap, which needs a paid plan. The same goes for a Zap that starts from a form and sends the address to mailfloss: one trigger, one action, free.
02How many tasks does a mailfloss Zap use?
One task per action that succeeds, and nothing for the trigger. A finished verification run reaching Zapier costs zero. Each row you then add to a sheet costs one task, and each address you send to mailfloss with Add Email costs one too. A failed action is not counted. To estimate, count the actions in your Zap, multiply by the number of results you expect per run, and compare with the allowance of your plan.
03Does mailfloss trigger Zaps instantly?
Yes. Flossing Completed is an instant trigger: mailfloss tells Zapier the moment a verification run is done, and the Zap starts without waiting for a scheduled check, on every plan including the free one. Zapier's polling intervals do not apply to it. In the editor, a Zap built on an instant trigger shows a lightning bolt. Note that the trigger waits for the end of the run, so the timing depends on when mailfloss finishes checking, not on Zapier.
04What does it take to connect mailfloss to Zapier?
A mailfloss account, plus access to whatever you do not own and want the Zap to touch. Open the Apps page of your Zapier account, click + Add connection, search for mailfloss, pick it and click Add connection. Sign in in the tab that opens and grant access. Then, when you set up Flossing Completed, decide which addresses this Zap should receive (all, passed or failed), since that field is required. For Add Email, make sure the starting app always provides an address.
05Why does a mailfloss Zap keep running in circles?
Because it may be writing where its own trigger watches. A Zap that starts on Flossing Completed and sends the same addresses back to mailfloss with Add Email feeds the very app its trigger listens to. If those checks end in a new run, the Zap fires again, and each loop spends tasks. Keep the two directions in separate Zaps: one that sends new addresses in from your form or other tool, and one that takes results out to a sheet or another app, never back into mailfloss.
06What if the mailfloss operation you need is missing?
Then it is not available on Zapier today. The integration has one trigger, Flossing Completed, and one action, Add Email, with no search step. A Zap cannot ask mailfloss about a single address and wait for the answer in the same run; it hands the address over, and that step brings no verdict back. Flossing Completed is the only operation that reports on finished checks. Anything beyond adding addresses and receiving results has to be done in mailfloss directly. Write down what the automation should achieve and check it against these two operations.
07Zapier, Make or n8n for mailfloss?
Pick on criteria, not on reputation. On Zapier, mailfloss offers one instant trigger and one action, so check first that adding addresses and receiving results at the end of a run covers your case. Then look at the shape of your Zaps: two steps fit the free plan, more need a paid one, and every successful action is a task, which adds up when a run returns many addresses. Compare what each other platform exposes for mailfloss on these same points.
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