Mails.so

@Mails.so validate the email address john.doe@example-corp.com before I add it to our outreach campaign

Validation complete for john.doe@example-corp.com. Status: Valid. The email address is deliverable with a quality score of 92/100. MX records are configured correctly, the domain is active, and no disposable email pattern was detected. SMTP verification confirms the mailbox exists. Safe to include in your outreach list.

Single email validation is ideal for real-time checks during form submissions or manual list curation. Each validation consumes one credit from your account balance. The quality score reflects deliverability confidence but cannot guarantee inbox placement or user engagement.

@Mails.so I have a CSV with 450 email addresses from our conference signup sheet. Validate them in bulk and flag any that won't deliver.

Bulk validation job submitted successfully. Job ID: batch_7k3m9p2x. Processing 450 email addresses. Estimated completion: 3-5 minutes depending on current queue load. Use the job ID to retrieve results once processing finishes. You'll receive a breakdown of valid, invalid, risky, and unknown addresses with detailed reasons for each classification.

Bulk validation is asynchronous — you submit the list, then poll for results using the batch ID. This example shows the submission step; a follow-up prompt would retrieve the completed results. Bulk jobs are more credit-efficient than validating individually but require waiting for processing to complete.

@Mails.so retrieve results for batch job batch_7k3m9p2x and summarize how many emails are safe to use versus risky or invalid

Batch results retrieved. Out of 450 emails: 387 valid (86%), 41 invalid (9%), 18 risky (4%), 4 unknown (1%). Invalid addresses include syntax errors and non-existent domains. Risky addresses are role-based (info@, support@) or disposable providers. Unknown results indicate temporary DNS issues during validation. Recommend using only the 387 valid addresses for your campaign to maintain sender reputation.

This example pairs the MCP's data retrieval with the AI's ability to synthesize actionable advice. The batch must be fully processed before results are available — polling too early returns a 'still processing' status. Results include granular reasons for each classification, useful for cleaning your contact database.

When Mails.so saves your sender reputation before a campaign

A 3-person growth team scraping 800 leads from LinkedIn for a cold email sequence needs to validate deliverability before hitting send. Mails.so's bulk validation tool catches catch-all domains, role addresses, and disposable inboxes in one batch job—preventing the bounce rate spike that tanks sender reputation. The team submits the list, retrieves results an hour later, and filters out 140 risky addresses before importing to their ESP. This works when your list is under 5,000 contacts and you're running campaigns weekly or monthly. If you're sending daily at scale or need real-time validation during a signup flow, you'll want a streaming integration instead. For pre-campaign hygiene at small-team velocity, Mails.so keeps your domain out of spam folders without engineering overhead.

Why single-email validation matters for support ticket routing

A 6-person support team gets 40 inbound tickets daily, half from free-tier users who typo their email during signup. Before escalating a ticket or sending a password reset, the team lead validates the sender address with Mails.so's single-email tool to confirm it's deliverable. This catches the user who wrote 'gmial.com' or the throwaway address that bounced three times last month. The validation runs in 2 seconds, surfaces syntax errors and mailbox status, and prevents wasted back-and-forth on dead threads. This is overkill if your support volume is under 10 tickets a week or your CRM already dedupes contacts. For teams triaging dozens of tickets daily without a validation layer in their stack, Mails.so's single-check tool closes the loop before you waste 15 minutes drafting a reply to a fake address.

When batch validation rescues a webinar attendee list

A 2-person marketing team runs a monthly webinar and collects 300 registrations through a Typeform that doesn't enforce email syntax. Two days before the event, they export the list and run Mails.so's bulk validation to catch typos, spam traps, and inactive accounts. The batch job flags 35 invalid addresses and 12 disposables, letting the team send reminder emails only to real attendees. This prevents the webinar platform from throttling their sends due to bounce complaints. The workflow breaks down if you're running daily events or need sub-hour turnaround—batch results take 30-90 minutes depending on list size. For monthly or quarterly events where you control the send schedule, Mails.so's batch tool cleans your list without adding a validation step to your registration form.