Marketers' Space: The importance of warming up your sender domain

Marketers' Space: The importance of warming up your sender domain

Hello Marketers,
Welcome back to yet another post! Today, we'll talk about why warming up your sender domain matters. Imagine you've recently started a business and want to share the news with your customers. You've designed a great email campaign using Zoho Campaigns. Naturally, you're excited and want to send it to all your contacts in one go; but if you skip the domain warm-up step, there's a good chance your emails will end up in spam instead of your contacts' inboxes.

What is a domain?

A domain is the unique address that marks a person's or business's identity on the internet. It's used for creating websites and sending emails, and helps recipients and service providers recognize who the message or website belongs to and whether it's coming from a trusted source.
If your email address is adam@zylkermotor.com, then zylkermotor.com is your domain.

What is domain warming?

Domain warming is a way of introducing your new domain to email service providers (ESPs) like Gmail, Yahoo, Outlook, and Zoho Mail. Instead of sending an email campaign to all your contacts at once, you start with small batches and send them to the people who are most likely to open and interact with your emails. This step is important because ESPs want to make sure you're a genuine sender. When they see you sending emails slowly and consistently—and your recipients are opening them—they start trusting your domain. But if you suddenly send thousands of emails from a brand new domain, it may look suspicious to them, like spam activity. Since they don't have any record of your past sending behavior, they may block your emails or push them to the spam folder. Warming your domain helps avoid that by showing ESPs that you're a real business sending valuable messages to people who want to hear from you.

This isn't so different from other aspects of our day-to-day lives. For example, if we decide to start weight training, we don't walk into the gym and immediately try to lift the heaviest weight possible; we know that in doing so, we'll not only fail but also likely cause ourselves serious injuries. What we can do is start with lighter weights and fewer repetitions and allow our muscles and joints (in this case, our domains and IP reputations) to adapt to the stress gradually. This process of progressive overload is necessary to build the strength and capacity to handle heavier loads later. In the same way, sudden, massive email volumes are like lifting the "heaviest weight" at the gym; it stresses the receiving systems. A slow, controlled increase in volume helps you safely build your sending capacity without "injuring" your reputation.

Why domain warming matters

As ESPs identify new and unknown domains as suspicious, sending large volume of emails suddenly without a sending history can lead to the following consequences:
  1. Low deliverability: Your emails will consistently land in spam folders, rendering all of your campaign efforts useless.
  2. Higher bounce rates: Since your sender reputation hasn't been established yet, mailbox providers may reject your emails, which may cause excessive hard or soft bounces and signal poor sending hygiene.
  3. Reputation damage: Once your domain/IP is flagged as a potential spammer, it's very difficult and time-consuming to repair that bad reputation.
  4. Blacklisting: In severe cases, your sending domain could be placed on an industry-wide blacklist, halting your email efforts entirely.
  5. Lower engagement: When emails don't reach inboxes, few people see or interact with them, which means fewer opens, clicks, conversions, and lower overall campaign performance.

How to warm up your sender domain using Zoho Campaigns: A use case

Morris has recently expanded his store, Zylker Designs, into an online presence and set up a domain called zylkerdesigns.com. Excited about the launch, Morris wants to draft a welcome email campaign and send it to 20,000 subscribers in one go. He approaches Eva from the Zoho Campaigns Support team with his requirement, who warns him that sending a large volume of emails from a new domain can trigger ESPs to mark the emails as spam—which is not an ideal start for Morris' new business. She recommends that Morris warm up his domain using Zoho Campaigns before sending his email in bulk.
Importance of domain warming
Here's how he can achieve it:
  1. Step 1: Morris has to authenticate his sender domain under Settings → Domain Authentication using SPF, DKIM, and DMARC to prove legitimacy and security.
  2. Step 2: Instead of targeting all 20,000 contacts at once, Morris can group his contacts into different segments, categorizing them based on most engaged and active subscribers (those who frequently open and click emails), moderately engaged, and so on.
  3. Step 3: He can then send his campaigns to small batches of these contacts, and then gradually increase the number of recipients. He can try sending the campaigns based on recipients' time zones or optimal open times to increase his chances that recipients will notice and open his emails.
  4. Step 4: For the next two to four weeks, Morris must slowly increase his daily sending volume after closely monitoring his open rates, bounce rates, and spam complaints under Campaign Reports.
  5. Step 5: When the engagement metrics start looking healthy and consistent, Morris can scale up and send emails to his entire audience, because by now ESPs will have recognized his domain as a trusted sender with a healthy reputation and good inbox reach.
By following this approach, Morris can ensure better deliverability, brand credibility, and email performance, laying a strong foundation for all his future email campaigns.

Wrapping it up

Warming up your sender domain isn't merely considered a best practice; it's a primary step that determines whether your emails reach your recipients' inboxes or not. By gradually building trust with ESPs, authenticating your domain, and sending first to contacts who engage with your emails, you can make sure to avoid deliverability problems right from the start. So before hitting "send" on your next bulk campaign, keep in mind that a warm domain earns a strong reputation, and a strong reputation earns better inbox placement, higher engagement, and healthier results.

Regards,
Aiswarya Jayaprakash
User Education
Zoho Campaigns

    • Recent Topics

    • {"code":1038,"message":"JSON is not well formed"}

      Today this began failing: sales_order_data = zoho.books.createRecord("salesorders",books_organization_ID,order_data); with this error message. {"code":1038,"message":"JSON is not well formed"} This code has been running for two years. Here is the input

    • How can I migrate Shared Mailbox from Zoho Mail to Team Inbox?

      I am unable to migrate mails from my shared mailbox in Zoho Mail to Team Inbox. I am the super admin of my Zoho One plan and yet I am getting an error saying only admins can do this? I don't understand the issue.

    • Remember all the ways we've posted?

      The world celebrates World Postal Day in 2025 with the theme “#PostForPeople: Local Service. Global Reach". The story of the “post” is a story of human connection itself, evolving from simple handwritten notes carried over long distances to instant digital

    • Can no longer upload my own Notebook cover

      I've had Notebook for over a year and have been able to create my own notebook covers, but when I tried to upload my own cover for a new notebook today, the upload feature has suddenly been starred, requiring me to upgrade my account. When did this

    • Zoho Desk - Cannot Invite or Register New User

      Hi who may concern, we encountered a problem that we cannot invite user or the visitor cannot register for a user at all through our help center portal, with the snapshot shown as below and the attachement. It always pops up that "Sorry, Unable to process

    • Custom domain issue

      I recently changed records for my support area custom domain for a few months, I then wanted to come back to Zoho, but now I can't connect it and I can't login as it's having an SSL issue. I cannot get a good response from support, as I've been notified

    • How do you generate personalized certificates and save them in dynamic folders using Writer's mail merge?

      Zoho Writer's mail merge feature can help you enhance the certificate management process. It's a great way to save time and effort! Merge certificates and maintain a well-organised repository with personalised certificates stored in separate folders for

    • Zoho Editor

      Zoho PDf Editor is not working I am clicking on EDIT PDf then it again bringing me back to the same page. again and again.

    • The present is a "present"

      The conversation around mental health has been gaining attention in recent years. Even with this awareness, we often feel stuck; the relentless pace of modern life makes us too busy to pause, reflect, and recharge. In the world of customer support, this

    • Market cap

      Market cap formula?? Kaise nikale

    • Create project (flow) and assign to person without account (company)

      Hi Zoho Support & Community, I'm trying to automate a process using Zoho Flow to create a Zoho Project and link it directly to a Zoho CRM Contact. This reflects our B2C workflow where we primarily deal with individual Contacts, not Companies/Accounts.

    • Mail and OS

      Jai Hind! Zoho is doing good by creating good software (made in india) on par with other tech giants. 🥰 Suggestion: 1. Whenever we sign up on zoho mail its asking for other mail id. It shouldn't be like that. You should ask general details of a user

    • Need Help to setup plugs along with codeless bot buidler. To send sms OTPs to users via Zoho Voice and to verify it

      Need Help to setup plugs along with codeless bot buidler. To send sms OTPs to users via Zoho Voice and to verify it. I get leads from our website and we need to make sure those are not junk. So we are using proactive chat bot and we need mobile OTPs to

    • Direct Integration Between Zoho Cliq Meetings and Google Calendar

      Dear Zoho Team, We’d like to submit the following feature request based on our current use case and the challenges we’re facing: 🎯 Feature Request: Enable meetings scheduled in Zoho Cliq to be automatically added to the host's Google Calendar, not just

    • Zoho sheet

      Unable to share zoho sheet with anyone on internet with editer option only view option is show

    • Personal account created under org account

      Hi there, I am Jayesh. We are using ME Central, and we have an account by the email ID soc@kissht.com.. Now I have created a personal account., jayesh.auti@zohomail.in, accidentally. Can you help me to remove this jayesh.auti@zohomail.in from my organization

    • Add another account

      How to add another mail account to my zoho mail.

    • Recover deleted user

      Hi by mistake i have deleted an added user and his email associated. Please help me recover it thank you.

    • No connection to the server

      Hello! I can't add a new email address to my mailbox because your server is rejecting me. Please help. I took and added a screenshot of this problem Marek Olbrys

    • Emails missing from desktop but visible on phone

      Subject says it all. Windows 11 laptop. Apple phone. all systems up to date.

    • Website Hosting

      Hello, I want to host my domain on Hostinger, and I want my emails to run through Zoho Mail. Please provide me with the SPF record, MX record (Type: TXT), and A record, so that I don’t face any issues with my emails. My website is on Hostinger hosting,

    • Can not search zoho mail after update V.1.7.0

      i can not search mail on to and cc box from attached picture and then search contacts box can't click or use anything. include replay mail too.

    • How to retreive the "To be received" value of an Item displayed in Zoho inventory.

      Hi everyone, We have our own Deluge code to generate a PO according to taget quantity and box quantity, pretty usefull and powerful! However, we want to reduce our quantity to order according to "To be received" variable. Seems like this might not even

    • Kaizen #211 - Answering your Questions | Using Canvas and Widgets to Tailor CRM for Mobile

      Howdy, tech wizards! We are back with the final post in addressing the queries you shared for our 200th milestone. This week, we are focusing on a couple of queries on Zoho CRM mobile configurations and custom payment gateway integration. 1. Mobile SDK

    • Remove "Invalid entries found. Rectify and submit again" modal

      Following up on a post from a few years back, but can the Zoho team consider either removing the 'Invalid entries found. Rectify and submit again' modal that displays for empty mandatory fields OR allow an admin to change it? I've built a custom error

    • Cadence reports as front-end reports

      Hello everyone, We have built a cadence which is connected to the Leads module. There are 11 steps in total, 7 are automatic emails and 4 are tasks for the Lead owners. As admins, we have access to this (very nicely made) 'View Reports' tab where we can

    • Show elapsed time on the thank-you page?

      Is it possible to display the total time a user spent filling out a Zoho Form on the thank-you? I’d like to show the difference between the `form submission timestamp` and the `start time` (currently have a hidden Date-Time field set to autofill the date

    • I need to do crud with snippet html

      I need to implement a form with an improved user interface. I would like to use snippets to build a CRUD that allows me to create and update records. How could I achieve this using snippets?

    • Incorrect “correct” password on email client apple mail

      I have troubleshot this account several times. I have deleted and re added account. It keeps saying incorrect password. Can you check that it is not locked on your end?

    • Is it possible to lock editing subform rows?

      Ideally editing would only be locked after the form has been updated but I still want them to be able to add new subform records at any time and they should be able to delete rows from the subform. It is a named subform if that's relevant however the

    • What is the maximum file size of a video upload in Zoho chat?

      Can I upload a 20 mb video file and share it with my colleagues? 

    • Update a field in ALL all calls under a contact

      HI guys! I have written some deluge code to update a field in my calls after i have comepleted the call, i need this field to update in all my scheduled calls as well that are comeing up. I just cant seem to get it to work, i have put teh code below,

    • Verifying Zoho Mail Functionality After Switching DNS from Cloudflare to Hosting Provider

      I initially configured my domain's (https://roblaxmod.com/) email with Zoho Mail while using Cloudflare to manage my DNS records (MX, SPF, etc.). All services were working correctly. Recently, I have removed my site from Cloudflare and switched my domain's

    • Fat Download of Ulaa Browser

      I just observed that Ulaa Browser is offering an one-capsule big download. These days it is a custom to offer a small bootstrap downloader and based on user customization options an appropriate download completes. And this is particularly common with

    • Billing Management: #8 Usage Billing in Logistics & Delivery Services

      The logistics and delivery industry thrives on movement and precision. Every delivery completed, every kilometre driven, and every ton transported is a measurable activity. However, billing often lags behind. Many logistics companies still rely on fixed-rate

    • Tags for New Tickets

      Hi there, When creating a new ticket, there is currently no way to choose a tag you would like to associate with the new ticket. Being able to associate a tag while creating a new ticket will be very beneficial as it will save time and flow well with

    • Zoho Desk: No Incoming email

      Is Zoho Desk services down? No incoming email reflect to desk tickets.

    • Zoho CRM - Widgets | Update #3 : Introducing SDK V1.5 along with new ZDK Methods and ZRC Support

      Hello everyone! Widgets in Zoho CRM just got a big upgrade! With the release of SDK v1.5, developers can now create more immersive widget experiences. This update elevates Widget development with new ZDK methods for easier interactivity and ZRC support

    • Unusual activity detected, account blocked

      I am unable to send emails and am getting the error "Outgoing blocked: Unusual activity detected. To unblock your account, please and submit a request. Learn more.". I am unsure as to why this is happening since all my activity is legitimate, mainly confirmation

    • Unable to Send Emails – Outgoing Mail Blocked (Error 554 5.1.8)

      Description: Hello Zoho Support Team, I am facing an issue with my Zoho Mail account ( admin@osamarahmani.tech ). Whenever I try to send an email, I get the following error: 554 5.1.8 Email Outgoing Blocked I would like to clarify that I have not done

    • Next Page