Quick Answer
Bulk email is sending one personalised campaign or triggered message to many recipients at once, such as newsletters, offers, order confirmations and OTPs. To reach the inbox today, senders must authenticate their domain with SPF, DKIM and DMARC, offer one-click unsubscribe and keep spam complaints low. SMSGatewayHub provides bulk email with a custom sending domain, drag-and-drop builder, REST API and real-time reports on Pay As You Go pricing.
Which kinds of bulk email can you send?
Mailbox providers treat marketing and transactional mail differently. Send each type from the right stream so one never drags down the other.
| Email type | Examples | How it is sent | Unsubscribe rule |
|---|
| Promotional | Offers, festival sales, product launches, re-engagement and win-back campaigns | Campaign to a subscribed list or segment, scheduled or sent now | One-click unsubscribe header plus a visible unsubscribe link required |
| Newsletter | Weekly or monthly updates, blog digests, webinar and event invitations | Recurring campaign to opted-in subscribers | One-click unsubscribe header plus a visible unsubscribe link required |
| Transactional | OTP verification, password reset, order and shipping confirmations, statements | Triggered one-to-one by a user action through the API | Keep it free of promotions; our footer and one-click header are still added, and an unsubscribe never blocks these emails |
| Automated sequences | Welcome and onboarding series, drip campaigns, follow-ups | Autoresponders triggered by subscriber actions | Unsubscribe required when the content is marketing |
Need transactional email only? Read about transactional email for business. For SMS equivalents see transactional SMS and promotional SMS.
What changed for bulk email senders?
Gmail, Yahoo and Outlook now enforce rules for anyone sending in bulk. Four requirements decide whether your campaign reaches the inbox or is rejected.
SPF and DKIM on your domain
Bulk senders must authenticate with both SPF and DKIM. SMSGatewayHub gives you the DNS records for your custom sending domain and checks they pass.
A DMARC record with alignment
Publish a DMARC policy for your domain (p=none is the minimum) and make sure the From domain aligns with SPF or DKIM.
One-click unsubscribe
Marketing mail must carry a one-click List-Unsubscribe header and a visible unsubscribe link, and unsubscribes must be honoured within two days.
Spam complaints under 0.3%
Keep the complaint rate well below 0.1% and never reach 0.3%. Mail that fails authentication or crosses the threshold can now be rejected outright, not just sent to spam.
Why SMSGatewayHub
Why choose SMSGatewayHub over other bulk email providers?
Good email is about reaching the inbox, protecting your domain and seeing what happened. Here is what you get with SMSGatewayHub.
Your own sending domain
Add custom sending and tracking domains with SPF, DKIM and DMARC so mail is authenticated as your brand, not a shared domain.
Bounce and suppression built in
Hard bounces, complaints and unsubscribes are suppressed automatically, which protects your sender reputation on every send.
No-code builder
Design responsive templates with the drag-and-drop editor, personalise with dynamic placeholders and schedule campaigns up to a year ahead.
Simple REST API
Create API keys to add subscribers, trigger campaigns and fetch delivery reports from PHP, Node.js, Python, Java or any HTTP client. Communications API
Email plus SMS and WhatsApp
Run email next to bulk SMS, WhatsApp and RCS from one company and one support team.
Certified, trusted 17+ years
ISO 27001, ISO 9001:2015, SOC 2 and VAPT tested, with 10,000+ registered businesses. Trust Center
| Question to ask any bulk email provider | SMSGatewayHub |
|---|
| Can I send from my own domain with SPF, DKIM and DMARC? | Yes, with custom sending and tracking domains. |
| Is one-click unsubscribe added automatically? | Yes. Every email gets the one-click List-Unsubscribe header and a footer with your company name, address and Unsubscribe / Manage preferences links; suppression lists are built in. |
| What happens to bounced addresses? | They are suppressed automatically so you do not keep mailing them. |
| Can I see opens, clicks and bounces live? | Yes, real-time analytics for every campaign. See platform features |
| Do you have an API for transactional email? | Yes, a REST API with API keys for any language. |
| How is it priced? | Pay As You Go, with no long contract. See bulk email pricing |
Choosing a platform? Read how to choose the right bulk email sending platform and our bulk email service with 24/7 support.
Bulk email use cases by industry
Each card links to the matching industry page or case study.
E-commerce & retail
Personalised offers, cart reminders, order and shipping confirmations and repeat-purchase campaigns. E-commerce case study
Healthcare
Appointment reminders, lab report notifications, health tips and OTP verification emails. Healthcare case study
Banking & finance
Account statements, transaction alerts, OTPs and regulatory notices sent securely. Banking case study
Agencies
Run newsletters and campaigns for many client brands, each on its own authenticated domain. Agency case study
Education
Admission updates, fee reminders, results and event invitations for parents and students. Messaging for education
Sender authentication and list hygiene checklist
What a healthy bulk email setup looks like before you hit send.
| Item | What to set up | Why it matters |
|---|
| SPF | TXT record on your sending domain authorising the sending servers | Proves the server is allowed to send for your domain |
| DKIM | Public key published in DNS; every email is signed | Proves the message was not altered and ties it to your domain |
| DMARC | v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.in, tightened to quarantine or reject over time | Required for bulk senders; tells mailbox providers what to do with failing mail |
| List-Unsubscribe | One-click header (RFC 8058) plus a visible link in the footer | Required for marketing mail; reduces spam complaints |
| Reverse DNS and TLS | Valid PTR record for sending IPs and encrypted transport | Basic requirements for all senders to major mailbox providers |
| List hygiene | Double opt-in forms, bounce suppression and removing long-inactive contacts | Keeps bounces and complaints low and protects reputation |
Sending from Gmail or a small SMTP server today? Compare options in best free SMTP server and see how inbox deliverability is managed.
How to start sending bulk email
Create your account
Register free or request a demo, and our team helps you plan your first campaign.
Authenticate your domain
Add the SPF, DKIM and DMARC records we provide for your custom sending and tracking domains.
Import your list
Upload opted-in subscribers, set custom fields and segments, or add contacts through list forms and the API.
Design and personalise
Build a template in the drag-and-drop editor, add dynamic placeholders and schedule or send.
Track and improve
Watch opens, clicks, bounces and unsubscribes in real time and refine your next campaign.
Bulk email resource map
Everything related to bulk email on SMSGatewayHub, grouped by what you need to do next.
Bulk email vs bulk SMS: which do you need?
Use bulk email for rich, long-form content: newsletters, catalogues, statements, invoices and onboarding sequences that customers read and keep. Use bulk SMS or OTP SMS when the message is short and urgent and must be seen within seconds, and WhatsApp when you want a two-way conversation.
Most businesses combine them, for example an order confirmation by email with a delivery alert by SMS, all from SMSGatewayHub. For a closer look, read why manual bulk email marketing holds you back and how businesses combine SMS, WhatsApp, RCS and email.
Frequently Asked Questions
What is bulk email marketing?
Bulk email marketing is sending one campaign to a large list of subscribers at the same time, such as offers, newsletters, event invitations and onboarding sequences. With SMSGatewayHub you can personalise every email and track opens, clicks and bounces in real time.
What is the difference between transactional and promotional email?
Transactional emails are triggered by a user action, such as an OTP, order confirmation or password reset, and are sent one to one. Promotional emails market products, services or events to a subscribed list and must carry an unsubscribe option. SMSGatewayHub handles both from one platform.
What do Gmail and Yahoo require from bulk email senders?
Bulk senders must authenticate their domain with SPF and DKIM, publish a DMARC policy aligned with the From domain, offer one-click unsubscribe on marketing mail and honour it within two days, and keep spam complaints below 0.3%. Mail that fails these checks can be rejected.
How do I improve inbox delivery for my campaigns?
Send from your own authenticated domain, mail only people who opted in, remove bounced and long-inactive addresses, and keep content relevant so complaints stay low. SMSGatewayHub's custom sending domains, automatic bounce handling and suppression lists help with each step.
How can I integrate the bulk email API into my application?
SMSGatewayHub provides a REST API with API keys that works with PHP, Node.js, Python, Java or any language that can make HTTP requests, plus official SDKs for seven languages. You can add subscribers, trigger campaigns and retrieve delivery reports programmatically.
How much does bulk email cost with SMSGatewayHub?
SMSGatewayHub uses Pay As You Go pricing for bulk email, so you pay for the volume you send without a long contract. Exact rates depend on volume; see https://www.smsgatewayhub.com/bulk-email-pricing or call sales on 1800 102 1822.
Do unsubscribed contacts still get OTP and order emails?
Yes. Every email carries a footer with your company name and address, an Unsubscribe link and a Manage preferences link, plus the one-click unsubscribe header Gmail and Yahoo require. An unsubscribe stops marketing email only; OTPs, receipts and order updates still arrive, and the unsubscribe page tells the customer so.
Can I schedule and automate email campaigns?
Yes. You can schedule campaigns up to a year in advance and set up autoresponders for welcome series, drip campaigns and follow-ups triggered by subscriber actions.
Reach the inbox with every campaign
Set up your authenticated sending domain, build your first template and send personalised email at scale on Pay As You Go pricing.