Integrations
Each page covers what breaks in that specific platform when bounces climb, because the thresholds and the consequences differ sharply between them.
Amazon SES enforces a hard bounce-rate threshold with account review. Mailchimp suspends. Klaviyo scores deliverability its own way. Cold-email tools increasingly ship their own verification, which is worth understanding rather than dismissing.
ActiveCampaign email verification
ActiveCampaign automations fire on contact creation, so an unverified import can trigger thousands of sends at once. Verify before the contact exists.
Airtable email verification
Airtable automations run per record with a scripting step. Batch through a script rather than a per-record automation, and mind the API rate limit.
Amazon SES email verification
SES pauses sending when the bounce rate crosses 5%, and puts accounts under review at 2%. Verify first, because the thresholds are enforced automatically.
Apollo email verification
Apollo labels addresses verified or guessed from its own database. A second live check on the guessed ones is where the bounces actually come from.
Attio email verification
Attio's data model lets you attach a verdict to the email attribute itself rather than the record, which is the right shape for contacts with several addresses.
AWeber email verification
AWeber reviews imported lists by hand before approving them for sending. Verify first so the review has nothing to object to, and the wait is shorter.
BigQuery email verification
Verify a BigQuery column without scanning the table repeatedly. Store the verdict with a timestamp, and only re-check what has aged or arrived.
Box email verification
Box is used where data governance is the point, so verification there needs retention set to match the classification on the file.
Braze email verification
Braze runs multichannel campaigns from one user profile, so an unusable email address should route a user to push or SMS rather than dropping them.
Brevo email verification
Brevo reviews accounts before the first send and watches bounce rates closely afterwards. Verify an imported contact list before that review rather than after.
Bubble email verification
Bubble apps run signup flows where the API key must stay server-side. Use a backend workflow, never a client-side API call.
Calendly email verification
A mistyped address on a Calendly booking means no invitation and no reminder, so the meeting is a no-show nobody could have predicted.
Capsule CRM email verification
Capsule uses tags rather than heavy custom fields, so the verdict fits naturally as a tag set you filter campaigns on. Here is the tagging scheme.
Celigo email verification
Celigo integrations sync systems of record, so a verification verdict has to flow both ways or one system will overwrite the other's.
Clay email verification
Clay chains enrichment providers with waterfall logic. Put verification at the end of the waterfall so every candidate address gets one live check.
ClickFunnels email verification
ClickFunnels funnels chain pages, so a bad address captured at step one breaks every follow-up in the sequence. Verify at the opt-in.
Close CRM email verification
Close sends from connected mailboxes, so a bounce lands on a rep's own domain reputation. Verify before a sequence enrolls anyone.
Constant Contact email verification
Constant Contact bills on contact count and removes hard bounces automatically. Verify before import so you stop paying for addresses that cannot receive mail.
ConvertKit email verification
ConvertKit bills on subscriber count and creators import lists from everywhere. Verify before the import so you stop paying for addresses that bounce.
Copper CRM email verification
Copper builds records from Gmail activity, so it captures every address a rep ever emailed, including the mistyped ones. Verify before those become a list.
Customer.io email verification
Customer.io bills by profile and triggers campaigns from events, so an unverified profile costs money and fires workflows from the moment it is created.
Drift email verification
Drift chatbots capture addresses mid-conversation, where people type quickly and mistype often. Verify in the bot flow and ask again.
Drip email verification
Drip workflows branch on subscriber data, so a verdict stored as a custom field turns unresolvable addresses into a routing decision rather than a bounce.
Dropbox email verification
Contact lists shared through Dropbox move between organizations, which makes provenance the first question and verification the second.
Dynamics 365 email verification
Dynamics splits contacts, leads and accounts across entities with separate email fields, and Microsoft-hosted domains resist probing. Both shape the approach.
Eloqua email verification
Eloqua's contact washing machine already normalizes data in-flight, which is where a verification step belongs rather than as a separate batch job.
Firebase email verification
Verify in a Cloud Function, never in the client SDK, and keep the verdict out of documents the client can read if it belongs to someone else.
folk CRM email verification
folk imports contacts from LinkedIn and browser capture, where addresses are often inferred rather than given. Verify before those enter a sequence.
Freshsales email verification
Freshsales scores leads automatically and email activity feeds that score. Bad addresses produce silence that the model reads as disinterest.
Front email verification
Front routes shared inboxes across teams, so a bounce from one team's outreach degrades a domain every other team replies from.
GetResponse email verification
GetResponse holds imported lists for review and enforces bounce thresholds afterwards. Verify before the import so neither gate is a surprise.
GoHighLevel email verification
GoHighLevel agencies run many sub-accounts on shared sending infrastructure, so one client's dirty list damages every other client's delivery.
Google Ads email verification
Customer Match needs a minimum list size to serve, and unmatched addresses count against it. Verify before upload so the audience actually runs.
Google Drive email verification
Contact lists sit in Drive as spreadsheets and CSVs nobody owns. Verify from Apps Script and write results back without downloading the file.
Google Sheets email verification
Verify a column of addresses in Sheets with Apps Script. Batch the rows, respect the execution time limit, and write results back without blocking the sheet.
Gorgias email verification
Gorgias links support tickets to Shopify orders, so a mistyped checkout address creates a customer support cannot match to their purchase.
Help Scout email verification
Help Scout sends replies from a shared mailbox, so bounces from bad customer addresses affect the domain your whole support team replies from.
HubSpot email verification
HubSpot bills by marketing contact and drops addresses into a bounced state you cannot easily reverse. Verify before contacts are created, not after.
Insightly email verification
Insightly links contacts to projects and opportunities, so deleting a bad address breaks relationships. Store a verdict and suppress instead.
Instantly email verification
Instantly ships its own verification. It is a fast filter rather than a live handshake, and the gap it leaves is the catch-all segment. Here is how to close it.
Integrately email verification
Integrately's one-click automations hide the steps, so a verification call needs a webhook step you configure yourself. Here is where it belongs.
Intercom email verification
Intercom mixes support conversations and outbound campaigns on one contact, so a bad address breaks support replies as well as marketing.
Iterable email verification
Iterable keys users by email by default, so changing a bad address creates a new user and orphans the old one's history. Verify before the first write.
Justuno email verification
Justuno segments visitors before showing an offer, so the verdict can feed that segmentation as well as cleaning the list it collects.
Keap email verification
Keap gates email marketing behind a compliance review and marks addresses unconfirmed. Verify before import so the review and the opt-in both go smoothly.
Klaviyo email verification
Klaviyo scores your sending health and suppresses addresses on its own terms. Verify before a profile import so its deliverability view starts from clean data.
Leadpages email verification
Leadpages forms feed straight into an email platform, so a bad address lands on the list before anyone sees it. Verify in the webhook and tag the lead.
lemlist email verification
lemlist personalizes deeply, so every wasted send is wasted enrichment too. Verify before the list enters a campaign and keep the unconfirmable ones out.
LinkedIn Ads email verification
LinkedIn matched audiences work best on personal addresses, and B2B lists are full of corporate ones that resist both matching and verification.
Mailchimp email verification
Mailchimp suspends whole accounts over high bounce rates, not only campaigns. Verify an audience before importing and keep the unresolvable addresses separate.
MailerLite email verification
MailerLite approves every new account by hand and watches bounce rates after. Verify before import so the approval and the first send both go smoothly.
Mailgun email verification
Mailgun sells its own validation and enforces bounce suppression. Both matter, and the second one is why a pre-send check pays for itself.
Mailshake email verification
Mailshake pauses campaigns automatically when bounce rates climb, so an unverified list stops a campaign mid-sequence. Verify before the first send.
Make email verification
Make charges per operation and its iterator multiplies them fast. Use an aggregator and the batch endpoint rather than iterating one address at a time.
Marketo email verification
Marketo's database size drives the license cost and its smart campaigns trigger on data changes. Verify before records are created, not after.
Meta Ads email verification
Custom Audiences and lookalikes are built from matched users, so dead addresses weaken the seed the lookalike model learns from.
Missive email verification
Missive blends team inboxes with chat, and its mail merge sends from individual accounts. Verify before a merge to protect those accounts.
monday.com email verification
monday boards hold contact data in email columns with no validation beyond format. Verify through an integration recipe and write the verdict to a status column.
MongoDB email verification
MongoDB's flexible schema means the same address can appear as a string, an array or a nested object. Normalize before verifying.
Moosend email verification
Moosend prices by subscriber count and its automations trigger on list membership. Verify before import so neither the bill nor the workflows see dead addresses.
MySQL email verification
MySQL's utf8 collation can silently truncate an address at an emoji or an accent. Check the column definition before blaming the verification.
n8n email verification
n8n can self-host and loop without per-task billing, which makes batch verification workflows practical. Here is the node layout that handles rate limits.
Notion email verification
Notion databases hold contact lists with no validation at all. Verify through the API on a schedule and write the verdict to a select property.
Nutshell email verification
Nutshell bundles email marketing with the CRM, so one bad list affects both sales sequences and campaigns. Verify once and gate both on the verdict.
Omnisend email verification
Omnisend runs email and SMS from one contact record, so a bad import costs twice. Verify before the contacts reach an automation workflow.
OneDrive email verification
OneDrive lists sit inside a Microsoft tenant, where verification probes against Microsoft-hosted recipients return unknown more often. Here is why.
OptinMonster email verification
Exit-intent popups capture addresses from people already leaving, which produces more throwaway entries. Verify before the subscriber is created.
Outreach email verification
Outreach reports on sequence performance at team level, so bad addresses distort the metrics management uses to judge reps. Verify before prospects are loaded.
Pabbly Connect email verification
Pabbly Connect prices by task with a one-time license option, which makes per-address verification viable where per-month tools make it costly.
Pardot email verification
Pardot syncs with Salesforce, so a verdict written in one appears in the other and can loop. Decide which system owns the field before you start.
Pipedrive email verification
Pipedrive persons can hold several email addresses at once, so a verdict per address matters more than a verdict per record. Here is how to store both.
PostgreSQL email verification
Store verdicts in their own Postgres table with a check timestamp and a partial index, so the query for stale rows stays fast as the table grows.
Postmark email verification
Postmark enforces transactional-only sending and watches bounce rates closely. Verify at signup so the account stays in good standing.
Power Automate email verification
Power Automate sits inside Microsoft 365, where verification probes are throttled. Expect more unknown verdicts on internal addresses, and why that is correct.
Privy email verification
Privy popups offer a discount for an address, which attracts throwaway entries. Verify before the code is issued and the subscriber created.
Redshift email verification
Redshift's UNLOAD and COPY through S3 is the natural path for verification: unload candidates, verify the file, copy results back.
Reply.io email verification
Reply.io runs multichannel sequences, so an unconfirmable address can route to a call or LinkedIn step instead of being dropped from the campaign.
Retool email verification
Retool apps are internal tools where staff type customer addresses by hand. Verify on blur and show the typo suggestion rather than blocking the save.
Salesforce email verification
Salesforce holds leads and contacts in separate objects with separate email fields. Verify both, store the verdict on the record, and use it in assignment rules.
Saleshandy email verification
Saleshandy throttles sending per mailbox to protect reputation. Verify first so that carefully rationed daily volume reaches addresses that exist.
Salesloft email verification
Salesloft cadences enforce step timing, so a bounce at step one means the prospect works through the whole cadence unreachable. Verify at import.
Segment email verification
Segment fans one identify call out to every downstream tool, so an unverified address is written everywhere at once. Verify in a function before it fans out.
SendGrid email verification
SendGrid's suppression lists are permanent per address, so a bounce from a typo locks out a real customer. Verify before the first send.
Sendinblue email verification
Sendinblue is now Brevo, and older integrations still point at the old API. Verify contacts before import, and check which API your automation is actually calling.
Shopify email verification
A mistyped checkout address means no order confirmation and a support ticket. Suggest the correction on the page, and never block a paid order.
Smartlead email verification
Smartlead rotates across many mailboxes, which spreads bounce damage rather than removing it. Verify before upload and segment the unconfirmable addresses.
Snowflake email verification
Snowflake external functions can call the verify API from SQL, but the per-row model does not suit it. Use a staged batch instead.
Streak email verification
Streak lives inside Gmail and sends from your own mailbox, so bounces hit your personal sending reputation. Verify before a mail merge goes out.
SugarCRM email verification
SugarCRM often runs on-premise behind a firewall, which changes how verification data moves. Here is the export-verify-import route that works either way.
Supabase email verification
Verify in a Supabase edge function so the key stays server-side, and keep verdicts in a table RLS protects from the client.
Tray.io email verification
Tray workflows handle high volume with real branching, so verification becomes a routing decision rather than a filter. Here is the branch layout.
Typeform email verification
Typeform validates email format and nothing more. Verify in the webhook and correct at the next question, which Typeform's one-question flow allows.
Unbounce email verification
Unbounce landing pages are paid traffic, so a bad address is a wasted click. Verify before the lead leaves the page and show the correction.
Webflow email verification
Webflow forms post to Webflow's own handler, so verification goes in a webhook after submission or a custom handler before it. Both work differently.
Woodpecker email verification
Woodpecker's own bounce shield stops sending to addresses that already failed. Verification is the step that happens before anything fails at all.
WordPress email verification
WordPress forms attract bot submissions and typos. Verify server-side in a form hook, keep the key out of the theme, and fail open.
Workato email verification
Workato recipes run in enterprise environments with change control, so verification belongs in a reusable connector rather than pasted into each recipe.
Zapier email verification
Zapier bills per task, so verifying inside a Zap costs a task per address. Batch where you can, and use a filter step so only real addresses continue.
Zendesk email verification
Zendesk creates a user from any incoming email, including mistyped reply-to addresses. Those users then receive ticket notifications that bounce.
Zoho CRM email verification
Zoho CRM enforces per-day email limits by edition, so every send to a dead address spends part of a hard quota. Verify before the campaign, not after.
Run a sample through it
100 free checks a month, no card, and the unknowns come back labeled.