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MailStrike
Kraków, Poland
What it is
MailStrike is an AI-powered email deliverability platform for mailbox warming, seed lists, and placement testing. It gives each connected mailbox an AI persona that writes and replies in threads based on a company description and industry. Its warming network exchanges threads among business mailboxes and excludes free-mail senders, spammers, and suspicious sites. Google Workspace and Microsoft 365 connect through one-click OAuth; other providers use IMAP and SMTP with an app password. On connection, MailStrike checks SPF, DKIM, DMARC, and MX records and returns missing record values to publish. Warming reaches full volume by day 21, then continues at a maintenance level. Seed lists monitor placement and can move messages from spam, mark them not spam, open and read them, click links, and mark them important. A DNS TXT record verifies seed-list domains. The Free Deliverability Test reports inbox, promotions, or spam placement and scores spam signals without a card. MailStrike runs on the web and through an API. Pricing starts at $18/mo (annual), with no free plan and a free trial.
For and against
For
- AI personas create and reply to mailbox threads
- Checks SPF, DKIM, DMARC, and MX records
- Warming reaches full volume by day 21
- Seed lists monitor and interact with messages
- Free deliverability test needs no card
Against
- No free plan
- Paid pricing starts at $18/mo (annual)
- Daily email limit is 30/day
- Seed lists require a DNS TXT record
The verdict
MailStrike combines mailbox warming, authentication checks, placement tests, and seed-list actions in web and API access. Its no-free-plan pricing and 30/day daily limit are important constraints to review.
Who it suits
It suits founders, cold-outreach teams, high-volume senders, B2C senders, and teams recovering from spam or scaling domains. Multiple mailboxes, custom warmup schedules, and spam monitoring support broader sending operations.
Plans and prices
Solo
1 mailbox · 1 placement test/month · 900 warming emails/month · AI persona
Read 5 Oct 2026 · mailstrike.ai
Growth
Up to 6 mailboxes · 12 placement tests/month · 5,400 warming emails/month · AI persona
Read 1 Oct 2026 · mailstrike.ai
Professional
Up to 20 mailboxes · 40 placement tests/month · 18,000 warming emails/month · AI persona
Read 1 Oct 2026 · mailstrike.ai
Custom
Unlimited mailboxes · custom test allowance · custom warming volume · API access
Read 1 Oct 2026 · mailstrike.ai
Seed Lists
Under 5,000 seeds/month · Gmail and Outlook placement · mix-in or pre-send modes · CSV export
Read 1 Oct 2026 · mailstrike.ai
On the record
- AI personas
- Each mailbox receives an AI persona that writes and replies in human-like threads using content generated from the company description and industry.mailstrike.ai · read 1 Oct 2026
- Authentication checks
- MailStrike checks SPF, DKIM, DMARC, and MX records when a mailbox is connected and returns the exact missing record value to publish.mailstrike.ai · read 1 Oct 2026
- Compliance and security
- MailStrike displays CASA Tier 2 validation and TAC Security validation on its site and states that its processing supports GDPR rights and legal bases.mailstrike.ai · read 1 Oct 2026
- Data location and retention
- Product data is processed and backed up in Germany, and deleted or anonymized within 30 days after account deletion except where law requires retention.mailstrike.ai · read 1 Oct 2026
- Free test
- The Free Deliverability Test reports inbox, promotions, or spam placement per provider and scores spam signals before sending, with no card required.mailstrike.ai · read 1 Oct 2026
- Google data protection
- For Google mailboxes, MailStrike says it does not store existing mailbox contents, does not use Google user data to train generalized AI models, and does not transfer that data to third-party AI services.mailstrike.ai · read 1 Oct 2026
- Mailbox connections
- Google Workspace and Microsoft 365 connect through one-click OAuth, while other providers use IMAP and SMTP with an app password.mailstrike.ai · read 1 Oct 2026
- Product
- MailStrike is an AI-powered email deliverability platform providing mailbox warming, seed lists for B2C senders, and placement tests.mailstrike.ai · read 1 Oct 2026
- Ramp and maintenance
- Warming reaches full volume by day 21 and then continues at a maintenance volume so sender reputation remains supported while campaigns run.mailstrike.ai · read 1 Oct 2026
- Seed-list rescue
- Seed lists monitor campaign placement and can move messages from spam to the inbox, mark them not spam, open them, read them, click links, and mark them important.mailstrike.ai · read 1 Oct 2026
- Seed-list setup
- Seed lists require one DNS TXT record for domain verification and can be added to any recipient list without API keys, OAuth, or installation.mailstrike.ai · read 1 Oct 2026
- Setup
- The company says mailbox connection takes under two minutes, requires nothing to install, and leaves existing sending tools unchanged.mailstrike.ai · read 1 Oct 2026
- Stack compatibility
- MailStrike says it works alongside Gmail, Outlook, Microsoft 365, Zoho Mail, Amazon SES, SendGrid, Mailgun, Postmark, Resend, Mailchimp, Brevo, Klaviyo, Customer.io, HubSpot, Pipedrive, Close, Instantly, lemlist, Smartlead, and Apollo.mailstrike.ai · read 1 Oct 2026
- Target users
- MailStrike describes use cases for founders starting outreach, cold outreach teams, senders recovering from spam, teams scaling to new domains, high-volume senders, and B2C senders.mailstrike.ai · read 1 Oct 2026
- Warming network
- MailStrike exchanges real threads among real business mailboxes and excludes spammers, free-mail senders, and dodgy sites from its network.mailstrike.ai · read 1 Oct 2026
