• Log in
  • Start With Free Plan
    Grow your business, not your expenses
    Turn curious visitors into devoted fans and drive more sales – no cost to get started!
    • Free Forever plan for 2,500 subscribers and up to 15,000 emails/month
    • Free & responsive email templates library
    • Free popups & forms
    • Intuitive drag-and-drop email builder
    • Unlimited automation and segmentation
    • Premade automation workflows
Ratings

Scalable SMTP for marketing and transactional emails

Sender's SMTP service is a dedicated email relay infrastructure built for developers, ecommerce teams, and SaaS platforms. It handles newsletters, transactional emails, and automated workflows through a single integration, with deliverability rates of up to 99% and no complex configuration required.

Start With Free Plan

No Credit Card Required. Cancel Anytime.

Email Deliverability
Join over 180,000 companies using Sender

SMTP infrastructure you can trust

SMTP is the standard protocol for routing email from an application to a recipient's inbox. Sender's SMTP infrastructure uses secure authentication, managed IP reputation, and continuous deliverability optimization to ensure messages reach inboxes consistently – whether you're sending hundreds or millions of emails per month.

Icon

SPF, DKIM & DMARC authentication

Sender supports SPF, DKIM, and DMARC to protect your domain reputation and improve inbox placement. Set up SPF, DKIM, and DMARC records via guided DNS configuration in the dashboard, and ensure every message goes out securely with TLS/SSL encryption.
Icon

Shared and dedicated IP options

For most senders, optimized shared IP pools handle delivery without any extra thought. Sending at higher volumes? Upgrade to a dedicated IP for full control over your sender reputation – consistent performance, no throttling, and no surprise delivery delays.
Icon

High deliverability & inbox placement

Sender continuously monitors IP reputation and fine-tunes delivery across Gmail, Outlook, Apple Mail, and other major inbox providers. Your SMTP email service stays optimized behind the scenes, so you can focus on content instead of troubleshooting deliverability.

No Credit Card Required. Cancel Anytime.

Flexible SMTP sending for all your needs

Send everything through a single, reliable SMTP pipeline–newsletters, transactional emails, notifications, and automated workflows–all supported by Sender's deliverability infrastructure.
Dedicated IPs on demand

Newsletters & campaigns

Send beautifully designed newsletters at scale using SMTP. Schedule messages, personalize content, and ensure consistent inbox placement to drive higher engagement and stronger subscriber relationships.
Suppression list management

Transactional emails

Password resets, order confirmations, account alerts, shipping updates – these are the emails people are actually waiting for. Sender's SMTP delivers them within seconds, and with transactional email templates powered by Liquid variables, each message adapts to the recipient automatically.
Automatic list cleaning

Automation, triggers & workflows

Stop sending emails manually. Build workflows with behavior-based triggers, lifecycle events, and personalized flows – the right email goes out at the right time, every time, using Sender's automation-ready SMTP backend.
24/7 deliverability support

API + SMTP + Webhooks support

Track delivery, opens, clicks, and bounces for every message in real time. Access SMTP delivery logs, choose between SMTP and REST API based on your stack, and pipe real-time updates to your own systems via webhooks.
Feedback loop integrations

Simple SMTP setup

Getting started takes minutes, not days. Point your app, website, or backend at Sender's SMTP server and set up your SMTP credentials – no servers to maintain, no infrastructure to babysit.
High-reputation IP pools

Bounce & spam monitoring

Sender automatically detects bounces, filters risky addresses, and suppresses spam-prone contacts to protect your reputation, maintain list hygiene, and prevent blocklist issues during SMTP sending.

SMTP solution for your industry

Compare plans and features

Choose the right plan for your business. Whether you're just starting out, or looking for advanced features, there's a plan for you.

Plan Volumes & Support
FeatureFreeStandardProfessionalEnterprise
Emails per month15 00012x subscribers24x subscribersUnlimited emails
Daily email limitsNo limitsNo limitsNo limitsNo limits
Free SMS creditsFree credits equal to your monthly subscription feeNoNoYesYes
Role-based seats1310Unlimited
Support24/7 Email & Live Chat24/7 Email & Live ChatPriority 24/7 Email & Live ChatPhone & Priority 24/7 Email & Live Chat
Email & SMS Campaigns
FeatureFreeStandardProfessionalEnterprise
Sender BrandingRequiredNoNoNo
Email CampaignsYesYesYesYes
Email A/B TestingNoYesYesYes
SMS CampaignsNoYesYesYes
SPAM CheckYesYesYesYes
Custom DKIM SettingsYesYesYesYes
SchedulingYesYesYesYes
Email Builder
FeatureFreeStandardProfessionalEnterprise
HTML EditorYesYesYesYes
Plain Text EditorYesYesYesYes
Drag & Drop EditorYesYesYesYes
100+ Premade Email TemplatesYesYesYesYes
Email Preview & Test EmailsYesYesYesYes
Dark Email PreviewYesYesYesYes
Email Size CheckerYesYesYesYes
Image LibraryYesYesYesYes
Image EditorYesYesYesYes
Product PickerYesYesYesYes
Feedback BlockNoNoYesYes
TimerNoNoYesYes
Custom HTML BlockYesYesYesYes
Video BlockYesYesYesYes
PersonalizationYesYesYesYes
Ecommerce BlocksIncludes blocks like Abandoned Cart, Billing Info, Order Summary, and more.YesYesYesYes
Saved Blocks / Reusable SectionsYesYesYesYes
Mobile vs Desktop preview toggleYesYesYesYes
Auto-branded emailsYesYesYesYes
Transactional Emails
FeatureFreeStandardProfessionalEnterprise
Event Webhook15UnlimitedUnlimited
Integrations
SMTP and APIYesYesYesYes
LibrariesYesYesYesYes
Setup GuideYesYesYesYes
Knowledge CenterYesYesYesYes
Deliverability features
Purpose-Built Mail Transfer AgentYesYesYesYes
Domain Authentication (SPF/DKIM)YesYesYesYes
Dedicated IP AddressesNoNo1 included*1 included*
Dedicated IP PoolingNoNoYesYes
Reputation & Delivery VisibilityYesYesYesYes
Suppression ManagementYesYesYesYes
Cloud Infrastructure with 99.99% UptimeYesYesYesYes
Privacy and Security
Single Sign-OnNoNoNoYes
Two-Factor AuthenticationYesYesYesYes
TLS EncryptionYesYesYesYes
GDPR ComplianceYesYesYesYes
Data Residency (EU)YesYesYesYes
Event Webhook SecurityYesYesYesYes
Analytics
Real-Time AnalyticsYesYesYesYes
Bounce and Block ClassificationsYesYesYesYes
Engagement TrackingYesYesYesYes
ISP Feedback Loop DataYesYesYesYes
Email LogsYesYesYesYes
Support
Access to Deliverability SupportYesYesYesYes
Others
Dynamic TemplatesYesYesYesYes
Teammate Permissions1310Unlimited
API Key PermissionsYesYesYesYes
Custom Sending DomainsUnlimitedUnlimitedUnlimitedUnlimited
Log Retention (days)11530
Bounce Classification (days)11530
Email & SMS Automation
FeatureFreeStandardProfessionalEnterprise
Email AutomationYesYesYesYes
SMS AutomationNoNoYesYes
Pre-Built WorkflowsYesYesYesYes
Custom WorkflowsYesYesYesYes
Triggers & Automation StepsUnlimitedUnlimitedUnlimitedUnlimited
Automation SplitsYesYesYesYes
Custom Trigger AutomationsYesYesYesYes
Auto Resend to Non-OpenersNoYesYesYes
Dynamic ContentIncludes blocks like Abandoned Cart, Billing Info, Order Summary, and more.YesYesYesYes
Subscribers Management & Segmentation
FeatureFreeStandardProfessionalEnterprise
Subscribers GroupsUnlimitedUnlimitedUnlimitedUnlimited
Contact ProfilesYesYesYesYes
SegmentationAdvancedAdvancedAdvancedAdvanced
Premade Basic SegmentsYesYesYesYes
Premade Ecommerce SegmentsYesYesYesYes
Behavioral TargetingYesYesYesYes
Campaign EngagementYesYesYesYes
Sign-up Forms & Popups
FeatureFreeStandardProfessionalEnterprise
Sender BrandingRequiredNoNoNo
Static Signup FormsYesYesYesYes
Popup FormsYesYesYesYes
40+ Popup & Signup TemplatesYesYesYesYes
Spin-to-Win WheelYesYesYesYes
Exit-Intent PopupYesYesYesYes
Custom TimingYesYesYesYes
Show On Specific LocationYesYesYesYes
Show When Element is ClickedYesYesYesYes
Scheduled FrequencyYesYesYesYes
SMS Opt-In CollectionYesYesYesYes
Unlimited Custom FieldsYesYesYesYes
TCPA & GDPR Consent CollectionYesYesYesYes
Landing Pages
FeatureFreeStandardProfessionalEnterprise
Sender BrandingRequiredNoNoNo
Landing Pages10UnlimitedUnlimitedUnlimited
Custom DomainNoYesYesYes
Responsive TemplatesYesYesYesYes
SEO SettingsYesYesYesYes
Real-Time ReportsYesYesYesYes
Premade BlocksIncludes ready-to-use blocks like Hero, Header, Features, Contacts, Call-to-Action, Newsletter Signup Forms, Pricing, Footer, and moreYesYesYesYes
Analytics & Reports
FeatureFreeStandardProfessionalEnterprise
Real-Time Campaign ReportsYesYesYesYes
Ecommerce ReportsNoYesYesYes
Heatmap/ClicksYesYesYesYes
Performance by GroupNoNoYesYes
Performance by Inbox ProviderNoNoYesYes
Audience GrowthYesYesYesYes
Automation ReportsYesYesYesYes
Form & Landing Page ReportsYesYesYesYes
Google Analytics TrackingYesYesYesYes
Team Access, Security & Support
FeatureFreeStandardProfessionalEnterprise
Number of Users1310Unlimited
24/7 Email & Chat SupportYesYesYesYes
Knowledge BaseYesYesYesYes
Email Marketing AcademyYesYesYesYes
Dedicated Success ManagerNoNoNoYes
Phone SupportNoNoNoYes
Two-Factor AuthenticationYesYesYesYes
Dedicated IPOn the 20,000 subscribers plan or aboveNoNoYesYes
Activity Logs for AuditNoNoNoYes
SSO (SAML V2)NoNoNoYes
Business Associate AgreementNoNoNoYes
Integrations
FeatureFreeStandardProfessionalEnterprise
ShopifyYesYesYesYes
WordPress / WooCommerceYesYesYesYes
PrestaShopYesYesYesYes
100+ Other integrationsYesYesYesYes
APIYesYesYesYes
WebhooksNoYesYesYes
Simple email marketing with affordable pricing
  • Premium features included
  • No hidden costs or usage limits
  • Scale from startup to enterprise
Simple email builder illustration

Easy integrations with popular tools

Website integration is a breeze with Sender. Connect instantly with leading content management systems, CRMs, and ecommerce platforms, including Wordpress, PrestaShop, WooCommerce, Zapier, and more.

Frequently Asked Questions

1.

What is an SMTP relay service and how does it work?

An SMTP relay service is a third-party platform that accepts outgoing messages from your application and routes them to recipients' mail servers using the Simple Mail Transfer Protocol. Instead of sending from your own server – which risks poor deliverability and blocklisting – the relay handles authentication, queue management, and delivery optimization for you. Sender's SMTP relay connects over SMTP ports 25, 2525, and 587 with TLS encryption.

2.

SMTP vs. API – which should I use for sending email?

SMTP is a standardized protocol that virtually every programming language and CMS supports out of the box – ideal for straightforward integrations and legacy systems. A REST API gives you finer control over metadata, attachments, and templating. Sender supports both, so you can monitor delivery with event-level logs whichever method you choose.

3.

Do I need a dedicated IP address to send email through SMTP?

Not necessarily. Shared IP pools work well for most senders and carry the collective reputation of the pool. For high-volume senders (500,000+ emails/month), a dedicated IP isolates your sender reputation entirely. Sender sets up dedicated IPs on Professional plan accounts at no extra cost.

4.

How do I connect Sender's SMTP to WordPress or WooCommerce?

Install the Sender WordPress plugin from your WordPress dashboard and activate it – it syncs forms, popups, and WooCommerce order data automatically. For SMTP-only setups, enter your Sender credentials into any WordPress SMTP plugin. No custom code needed.

5.

Can I use Sender's SMTP service for both marketing and transactional emails?

Yes. Newsletters, promotional campaigns, password resets, order confirmations, and automated drip sequences all run through one SMTP service. Delivery logs, open/click tracking, and bounce management apply across every email type, giving you a single view of performance without separate tools.

Floating

Always ready
to help you

We work around the clock to assist you. Drop us a message any time,
and we’ll get back to you in seconds!

Opening hours
24/7
Always available
Mobile chat
10 sec
Avg. response time
Smile
99%
Satisfaction rate
  • Onboarding assistance
  • Extensive knowledge base
  • Free migration service

Trusted by 180,000+ successful
businesses worldwide

Momentum leader High performer Capterra leader