Folderly From $4.67/mo · Free plan 9.1 Visit WarmEnvelopes
warmenvelopes.com
What it is
WarmEnvelopes is a web service that schedules genuine warm-up emails from a configured domain through the user’s Resend account. Messages go to inboxes the user controls, or whose owners have consented, to build sending history. Setup requires a verified sending domain and a Resend API key, with a separate key stored for each domain. A scheduler runs every 30 minutes and spreads the daily target across the day. Pro users can set starting volume, daily increases, and a maximum. The library contains more than 1,000 independently written messages in several languages, varying templates and sender names. Each send records its sender, template, delivery status, and errors, while the dashboard shows daily progress. The Free plan costs 0.00 EUR and permits four emails per day per domain across up to 10 domains. Pro costs €9 a month and supports up to 1,000 daily emails. A separate checker reviews SPF, DKIM, DMARC, MX, and blocklist status.
Spec sheet
- What it does
- WarmEnvelopes builds sending history for a domain by sending genuine emails through the customer's Resend account to inboxes the customer controls.Read 15 Oct 2026 · warmenvelopes.com
- Purpose
- WarmEnvelopes schedules real warm-up emails from a configured domain through the user's Resend account to recipient inboxes they control, to build sending history.Read 7 Oct 2026 · warmenvelopes.com
- Privacy
- The privacy policy says the service does not read users' inboxes and does not sell or share data for advertising.Read 15 Oct 2026 · warmenvelopes.com
- Compliance
- The privacy policy gives users GDPR access, correction, deletion, restriction, objection, and portability rights.Read 15 Oct 2026 · warmenvelopes.com
- Acceptable use
- Users may only configure domains they own or are authorized to manage and recipient inboxes whose owners consent to receive the messages.Read 15 Oct 2026 · warmenvelopes.com
- Account access
- Users sign in with Google.Read 15 Oct 2026 · warmenvelopes.com
- Authentication
- Warm-up messages are described as SPF, DKIM, and DMARC aligned when accepted by the receiving mailbox.Read 15 Oct 2026 · warmenvelopes.com
- Data handling
- The privacy policy says WarmEnvelopes does not read users' inboxes, sell or share data for advertising, or use analytics cookies unless accepted.Read 7 Oct 2026 · warmenvelopes.com
- Data stored
- Stored configuration includes domains, Resend API keys, ramp settings, and recipient inbox addresses.Read 15 Oct 2026 · warmenvelopes.com
- Domain checker
- A free checker without sign-up tests SPF, DKIM, DMARC, MX, and blocklist status.Read 15 Oct 2026 · warmenvelopes.com
- External context: Gmail monitoring
- Google recommends monitoring server responses, spam rate, and sending-domain reputation while increasing volume.Read 15 Oct 2026 · support.google.com
- External context: Gmail pacing
- Google advises senders to start with low volume, increase gradually, send consistently, and avoid bursts.Read 15 Oct 2026 · support.google.com
- External context: Gmail spam threshold
- Google's sender FAQ says senders should keep spam rates below 0.1% and avoid reaching 0.3% or higher.Read 15 Oct 2026 · support.google.com
- External context: industry guidance
- M3AAWG publishes sender best-practice guidance covering technical and policy aspects of commercial electronic messaging.Read 15 Oct 2026 · m3aawg.org
- External context: Resend API
- Resend's pricing documentation lists a RESTful API and official SDKs as sending capabilities.Read 15 Oct 2026 · resend.com
- External context: Resend free quota
- Resend's Free plan allows 3,000 emails per month and 100 emails per day, so WarmEnvelopes sends share that quota.Read 15 Oct 2026 · resend.com
- External context: Resend paid pricing
- Resend lists Pro at $20 per month for 50,000 emails and no daily email limit.Read 15 Oct 2026 · resend.com
- External context: Spamhaus ZRD
- Spamhaus says newly observed domains are placed on its Zero Reputation Domain list for 24 hours and then removed automatically.Read 15 Oct 2026 · spamhaus.org
- Integration
- It requires a verified sending domain and a Resend API key, and each domain stores its own key.Read 7 Oct 2026 · warmenvelopes.com
- Intended audience and use
- The service is for warming domains the user owns or is authorized to manage, using recipient inboxes they own or whose owners consented to receive warm-up mail.Read 7 Oct 2026 · warmenvelopes.com
- Limit: deliverability scope
- WarmEnvelopes says it does not repair broken DNS, poor recipient lists, or spam-like content.Read 15 Oct 2026 · warmenvelopes.com
- Limit: inbox guarantee
- The service expressly says it cannot guarantee inbox placement or delivery rates.Read 15 Oct 2026 · warmenvelopes.com
- Limit: provider support
- The documented sending integration is Resend, so the service requires a Resend account and does not present support for other ESPs.Read 15 Oct 2026 · warmenvelopes.com
- Limit: quota consumption
- Warm-up messages consume the customer's Resend sending quota because they leave through the customer's API key.Read 15 Oct 2026 · warmenvelopes.com
- Limits
- It does not guarantee inbox placement or fix broken DNS, poor recipient lists, or spam-like content.Read 7 Oct 2026 · warmenvelopes.com
- Message format
- Warm-up messages are described as short plain correspondence without images, attachments, tracking pixels, or marketing language.Read 15 Oct 2026 · warmenvelopes.com
- No simulated engagement
- WarmEnvelopes says it does not use shared inbox pools, bot opens, scripted replies, or automated spam-folder rescues.Read 15 Oct 2026 · warmenvelopes.com
- Operator
- WarmEnvelopes is operated by DataOps, s.r.o., a company registered in the Czech Republic.Read 15 Oct 2026 · warmenvelopes.com
- Pacing
- A scheduler runs every 30 minutes and spreads the daily target across the day; Pro lets users configure the start, increment, and maximum volume.Read 7 Oct 2026 · warmenvelopes.com
- Pro controls
- Pro users can set a starting volume from 1–50/day, an increase from 0–50/day, and a ceiling up to 1,000/day.Read 15 Oct 2026 · warmenvelopes.com
- Processors
- Named processors are Vercel for hosting, Neon in the EU for the database, Stripe for payments, and Google for authentication.Read 15 Oct 2026 · warmenvelopes.com
- Ramp formula
- Daily volume follows min(start + increment × days since start, maximum), with days counted in UTC.Read 15 Oct 2026 · warmenvelopes.com
- Ramp scheduler
- A scheduler runs every 30 minutes and spreads the daily target across the day instead of sending a burst.Read 15 Oct 2026 · warmenvelopes.com
- Resend integration
- Each configured domain stores its own Resend API key and sends through that customer's Resend account.Read 15 Oct 2026 · warmenvelopes.com
- Sending log
- Every attempt is logged with sender, recipient, template, timestamp, delivery status, and any error message.Read 15 Oct 2026 · warmenvelopes.com
- Setup
- Setup requires a Resend-verified domain, a Resend API key, and recipient inboxes owned or controlled by the user.Read 15 Oct 2026 · warmenvelopes.com
- Support and operator
- The site identifies DataOps, s.r.o. as the operator and directs users to wearedataops.cz for contact; account deletion requests can be made by contacting the operator.Read 7 Oct 2026 · warmenvelopes.com
- Template library
- The service says it has more than 1,000 independently written warm-up messages in several languages.Read 15 Oct 2026 · warmenvelopes.com
- Template randomization
- Each send randomly selects a template and uses the sender name associated with that template.Read 15 Oct 2026 · warmenvelopes.com
- Templates
- WarmEnvelopes says its library contains more than 1,000 independently written messages in several languages, with randomized template and sender name.Read 7 Oct 2026 · warmenvelopes.com
Plans and prices
Free Free free forever 4 warm-up emails/day per domain · up to 10 domains · sending log and filters · no credit card Read 15 Oct 2026 · warmenvelopes.com
Pro €9 a month billed monthly via Stripe 1–50 starting emails/day · 0–50 daily increase · up to 1,000 emails/day · up to 10 domains · sending log and filters · Resend quota applies Read 15 Oct 2026 · warmenvelopes.com
Strong points and limits
Strong points
- Free plan supports up to 10 domains
- Real mail to controlled inboxes
- More than 1,000 message templates
- Detailed sending logs
- Domain checker needs no sign-up
Limits
- Requires a verified domain and Resend API key
- Does not guarantee inbox placement
- No spam monitoring
- Google sign-in required
Who it suits
It is intended for owners or authorized managers of sending domains who control, or have consent for, recipient inboxes. Pro is for users needing configurable ramping and higher daily volume.
Verdict
WarmEnvelopes provides scheduled, logged warm-up sending with private recipient control and two plan levels. It does not repair DNS, recipient-list problems, or spam-like content, so those remain user responsibilities.
Where Specifiction places it
- Email Warmup Software#5 of 248.4
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