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Bulk and cold email since 2008

Bulk email marketing services built for cold email at scale

Find leads, clean the list, rotate mailboxes and SMTP servers, and track every send from one account. Cold email and single opt-in are allowed. Plans start at $29/month for 25,000 emails.

Cold email allowedMonth-to-month billingUS company, est. 2008
One campaign, many roads to the inbox
Your campaign
One send, rotated across every path
Purchased mailboxes
Up to 2,000 sends a day each · $3/month
Google Workspace
Connected with OAuth · 960 a day by default
Managed SMTP servers
5,000 sends a day each · $20/month
BulkResponse sending
The default path. Nothing to configure

Trusted by teams at

Move your list from, or connect to

MailchimpAWeberGetResponseiContactConstant ContactGmailGoogle WorkspaceOutlookAny SMTP softwareYour own domainMailchimpAWeberGetResponseiContactConstant ContactGmailGoogle WorkspaceOutlookAny SMTP softwareYour own domain
Why outbound stalls

Outbound breaks in the same three places. We fixed all three.

If you send cold or high-volume email in the US, you have probably hit at least one of these walls this year.

Your ESP freezes the account

Most newsletter platforms treat a cold list as a policy violation. One import, one complaint spike, and the account is locked in the middle of a campaign.

Mailboxes hit the ceiling

A free Gmail inbox tops out near 100 sends a day. Reaching 10,000 prospects a week takes dozens of inboxes and a clean way to rotate them.

Five tools, five invoices

Lead database, verifier, mailbox vendor, sequencer, SMTP provider. Every handoff is a CSV export, another login and another monthly bill.

BulkResponse puts the whole pipeline in one account.
Cold email is a core use case, sending spreads across mailboxes and servers, and leads, cleaning and campaigns share one login.
How it works

Find leads, clean them, then mail them

Five steps, one account. No CSV ping-pong between vendors.

Find
Filter B2B leads, pay per lead
Clean
One credit per address
Connect
Mailboxes, SMTP or ours
Send
Vary, schedule, rotate
Track
Live stats while it sends
The platform

Everything you need to send, in one account

Use the full Web App, or buy one piece on its own. Every product links to the next step.

Bulk cold email service

Send first-contact email at volume with mailbox rotation, spin variation and automatic follow-ups.

From $29/mo
Explore cold email

Bulk email marketing software

Lists, a drag-and-drop designer, autoresponders, triggers and live stats for high-volume campaigns.

Single opt-in OK
See the software

Mailboxes and SMTP

Connect Gmail and Outlook, buy pre-warmed mailboxes, or add any SMTP server. Rotate them on one campaign.

$3 per mailbox
See mailbox options

Lead Finder

Search B2B contacts by title, industry, location and revenue. Pay per lead and drop them onto a list.

New in 2026
Explore Lead Finder

Email list cleaning

Clean a list inside your account before you mail it. One credit per address, and credits carry over.

Packs from 50,000
See list cleaning

SMTP relay service

Keep the software you already use. Get SMTP credentials, a monthly credit pool and bounce history.

50,000 for $29/mo
See SMTP relay

Bulk email servers

Add capacity in blocks of 5,000 sends a day, or ask for a dedicated server quoted to your volume.

$20 per server
See mail servers

Bulletproof SMTP server

Rotation across servers, visible failures and correct bounce handling, so one bad path does not stop the send.

Resilient sending
What bulletproof means

Every feature

Campaign builder, audience filters, pause and resume, AI spin variation, reporting and more.

Full inventory
Browse all features
AI spin variation

Stop sending the same cold email 50,000 times

Identical messages are easy for mailbox providers to spot. BulkResponse generates one to five variations of your subject, HTML body and plain-text body. You approve the ones you like, and each recipient gets one of them.

  • Works on campaigns, autoresponders and inside the designer
  • Every version is approved by you before it sends
  • Personalization tags like {first_name} and {company} stay in place
See how cold email sending works
AI spin variationExample
Subject line, 3 approved variations
AQuick question about {company}'s Q1 pipeline
B{first_name}, worth a 10 minute call?
CIdea for {company}'s outbound
SubjectHTML bodyPlain-text body1 to 5 versions
Live control

Mail only the people who clicked. Pause a send that is already running.

Filter any send by who opened, who clicked a specific link, or who did neither. Watch opens, clicks and bounces update while the job is still going, and pause it the moment something looks wrong.

  • Audience filters by click, open, domain, date added and confirm status
  • Pause, resume or resend from the job queue
  • Country map and exports for opens, clicks, bounces and unsubscribes
Browse every feature
BulkResponse campaign statistics updating while a bulk email campaign is still sending
Daily sending caps

Real numbers for every road out of your account

Teams rotate because single inboxes are small. These are the actual per-day caps inside BulkResponse, so you can plan a campaign before you buy anything.

  • Connect Google and Outlook with OAuth. Your password is never stored
  • Buy mailboxes at $3 a month, up to 100 per order
  • Add managed SMTP servers at $20 a month, up to 20
Compare mailbox and SMTP options
Emails per day, per connection
Free Gmail (OAuth)100 hard cap
Google Workspace (OAuth)1,000 hard cap
Purchased BulkResponse mailbox2,000 per mailbox
Your own mailbox over SMTP3,000 hard cap
Managed SMTP server5,000 per server
2008
Year BulkResponse started sending
18 yrs
Running bulk email infrastructure
100,000
Sends a day with 20 managed servers
$29
Starting price for 25,000 emails
Why teams switch

Built for outreach, not just newsletters

How BulkResponse compares with the two categories most teams try first.

Category comparison, October 2026. Individual products in each category differ.
Newsletter ESPCold email sequencerBulkResponse
Cold email and single opt-inOften restrictedAllowedAllowed, inside sending policies
How mail leavesTheir shared serversYour mailboxes onlyOur infrastructure, your SMTP, or mailboxes
Rotate mailboxes on one campaignNoYesYes
SMTP relay for your own softwareNoNoYes, as its own product
List cleaning inside the accountVariesVariesYes, one credit per address
B2B lead search inside the accountNoVariesYes, Lead Finder
Pause a send that is already runningVariesVariesYes
Pricing

Simple pricing that scales with your volume

Public prices, no sales call required. Pick a product and slide to the number you send.

Most popular

Web App

$29/month

25,000 emails a month, up to 10 million

Slide to your volume

SMTP Relay

$29/month

50,000 relay credits, up to 1 million

Slide to your volume

List Cleaning

$24.50one time

50,000 addresses (list price $49)

Slide to your volume
Mailboxes $3/month eachManaged servers $20/month eachLead Finder, pay per lead
See full pricing

No free tier. Month-to-month plans, cancel by request before your next bill date.

Customer reviews

Senders who stayed for years

Quoted word for word from Trustpilot and Capterra, with the reviewer and date. Click through and read every review, including the critical ones.

Trustpilot
“A GREAT alternative to Amazon SES without all the Bounce Rate Limits!”
FaustoUnited States · May 2026Read
Trustpilot
“Excellent Service over many years.”
ColinSpain · May 2024Read
Capterra
“Great experience, I have used other services but they did not guide me.”
Mubashir H.Professor and Dean · May 2024Read

Ratings read from each site in October 2026. Review counts are shown next to every score.

Domain setup

Authenticate your domain without guessing

DNS is where most new senders get stuck, so we keep it short and we help with the hard part.

  1. Add and verify your sending domainAdd it in account settings and click the link we email you.
  2. Publish one SPF recordCopy the TXT record on the right into your DNS.
  3. We help you publish DKIMAdding a domain notifies our support team, and we work through DKIM with you.
  4. Track on your own hostnameOptional: opens, clicks and unsubscribes on your domain, over HTTPS.
TXT record for yourdomain.com
v=spf1 include:spf.bulkresponse.com -all
Need help? Open a ticket at help.bulkresponse.com or call +1 (628) 262 3981.
FAQ

Questions buyers ask before they sign up

What is BulkResponse?
BulkResponse is a bulk and cold email platform established in 2008, based in Hawthorne, California. One account covers lists, campaigns, follow-ups, mailbox rotation and stats. SMTP relay, list cleaning, Lead Finder and managed servers are available alongside it.
Is cold email allowed on BulkResponse?
Yes, inside our sending policies. Cold email and B2B outreach are a core use case, and single opt-in is a list setting. You stay responsible for the laws that apply to you and your recipients, such as CAN-SPAM in the US.
How much does BulkResponse cost?
The Web App starts at $29 a month for 25,000 emails and scales to 10 million. SMTP Relay starts at $29 a month for 50,000 credits. List cleaning is a one-time pack from 50,000 addresses. Mailboxes are $3 each a month and managed servers are $20 each a month.
Is there a free trial?
No. There is no free tier and no free test account. You start on the smallest paid plan, $29 for 25,000 emails, and can request cancellation if it is not a fit.
How many emails can I send per day?
It depends on how mail leaves your account. A free Gmail inbox is capped near 100 a day, a purchased BulkResponse mailbox sends up to 2,000 a day, and a managed SMTP server sends up to 5,000 a day. One campaign can rotate across many of them.
What is the difference between the Web App and SMTP Relay?
The Web App is the full platform: lists, campaigns, follow-ups, mailbox rotation and stats. SMTP Relay gives you SMTP credentials and a monthly credit pool for software you already use. A relay login does not include campaigns or lists.
Can I move my list from Mailchimp or another platform?
Yes. Import a file or paste addresses, then rebuild lists, fields, forms and campaigns in the same account. The migration checklist covers Mailchimp, AWeber, GetResponse, iContact and Constant Contact.
Do you help with SPF and DKIM?
Yes. You publish one SPF record, v=spf1 include:spf.bulkresponse.com -all, and our support team helps you publish DKIM when you add a sending domain.
See all questions
From the blog

Guides for people who send a lot of email

Deliverability, cold email and SMTP, written by the team that has run sending infrastructure since 2008.

Start sending this week

Pick a plan, connect your domain, and run your first campaign. Plans from $29 a month for 25,000 emails, month to month.

Questions first? Call +1 (628) 262 3981 or email sales@bulkresponse.com.