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

    • Tables improvement ideas / features

      Heya, I've been using Zoho Tables for a few months now and wanted to post some features that I think will be greatly beneficial for the tool: 1. Ability to delete a record in automation or move a record in automation. - Usecase: I move a record from one

    • Announcing offline payment modes for event tickets

      Hello everyone,   Collecting ticket payments from prospective attendees can be a tricky part of event planning. While Zoho Backstage has always allowed you to collect payments online as people buy tickets from your event microsite, we have now enabled

    • Gmail is ramping up its email sender policy from November 2025

      Hello marketers, As you may be aware, Gmail introduced a guideline for bulk senders starting February 2024. If not, here's a quick refresher straight from Google: After this policy was announced first in 2023 and soft-implemented in February 2024, we

    • Is there a list of Zoho Icons?

      Is there a list of Zoho Icons you can reference: i.e. business-gold is <image marginRight='7px' color='#2A70E7' bgColor='#FFFFFF' width='52px' height='52px' type='icon' value='business-gold' size='24px' cornerRadius='26px' iconType='solid' /> Thanks!

    • Item images

      Can we get an "On hover" expanded image for items please ?

    • Ability to Create and Manage YouTube Video Chapters in Zoho Social

      Hi Zoho Social Team, How are you? We would like to request an enhancement to Zoho Social that would allow users to create and manage YouTube video chapters directly within the platform. Currently, Zoho Social does not support manually adding chapters

    • What happens to my current site SEO if i opt for zoho creator?

      I have an existing website and I need to use Zoho creators for the rapid creation of my webpage creation. Currently, my IT team is creating the web pages, but I am concerned about the SEO of my current website if I shift to zoho will i loose it all?

    • Preview Emails with Merge Fields before sending

      Hello, Are there plans to preview an email with merge fields before sending out? Currently, all you see in the preview are the merge field values, but before I send out the email I want to make sure the merge is working. Also, the saved emails only show

    • User Filter not selecting All Items

      We are encountering 2 issues when using the user filter. When users are trying to search using the filter option, the OK button is grayed out. Users have to unselect or make a change before it filters properly. 2. When filtering and the OK button works,

    • Support Nested JavaScript Variables in PageSense Pop-up Targeting

      Hello Zoho PageSense Team, I hope you're doing well. I’d like to request a feature enhancement for the PageSense pop-up targeting functionality. Current Limitation: Currently, PageSense pop-ups can be triggered using simple JavaScript variables. However,

    • Cannot Invert Axis for Rankings

      Hi there I want to be able to create a ranking graph in Analytics/BI, with 1 at the top of the Y axis, but I am unable to invert the axis. Super simple example in Excel below. Higher rankings need to be higher up on the graph to give the correct visual

    • How to copy value from a single line field into a picklist field within a module's subform?

      Hello there, I have a single line field in a module's subform. I would like the value in the field to automatically update a picklist field within the same subform (both have items with the same names). Is this possible via function? Unfortunately, workflows

    • Committed Stock and To Be Received Stock via API?

      Is it possible to retrieve Committed Stock and/or To Be Received Stock for an Item via the API? I want to use this information for calculating the amount of inventory needed to be purchased.

    • Creating Email template that attaches file uploaded in specific field.

      If there's a way to do this using Zoho CRM's built-in features, then this has eluded me! I'm looking to create a workflow that automatically sends an email upon execution, and that email includes an attachment uploaded in a specific field. Email templates

    • Marketer’s Space - Automate a Personalized Holiday Workflow with Zoho Campaigns

      Hello marketers, Welcome back to another post in Marketer’s Space! From Thanksgiving through Christmas, you have a flurry of opportunities to connect with your audience. In this post, we’ll see how you can plan an entire month-long automated workflow

    • Sorting columns in Zoho Projects

      Hi, In project management best practice, sorting columns (ascending, descending) is an important tool. Sorting dates to see the order of tasks starting, sorting on priority or even on planned hours is a must for an efficient project control. Currently,

    • Zoho CRM - Calendar Cards View - Let Users Decide What Is Displayed On Calendar Entries

      Imagine planning your week of face-to-face meetings across three counties. You’re trying to group appointments by location to make the best use of your time, but Zoho CRM’s calendar doesn’t show where each meeting is happening. You’re left trying to remember

    • Zoho Inventory - How to pay a supplier up front then receive multiple deliveries

      How do we manage situations where we pay a supplier up front, then the receive the products in increments? Example Workflow: Create Purchase Order > Receive Bill for full amount > Receive Items 2 or more deliveries. Currently, once a Bill is created against

    • How can I add or change the active customer in Zoho Projects?

      I'm trying to change the customer in an active Zoho project. Is it possible to add or change the customer?

    • What happens when someone clicks 'unsubscribe' in a zoho CRM email

      Hello, As per, i am going round in circles trying to find an answer to these 2 question. I have an email template that has an unsubscribe link in the footer in zoho CRM. First, what happens when someone clicks it - where does the contact get unsubscribed

    • Zoho CRM - Scheduled Reports Which Contain Chart

      Hi Zoho CRM Team, I'm requesting that the Report Export and Scheduling feature be enhanced to include a chart, if one has been created on a report. At the moment I have a report which shows Sales This Week by Deal Owner and a pie chart at the top of the

    • Cadences

      I have just started using Cadences for follow-up up email pipeline. Is it just me or do you find the functionality very basic? For example, it will tell me (if I go looking for it) if someone has replied to a follow-up and been unenrolled; but it won't

    • Canvas View in Zoho Recruit

      Is it possible or would it be possible to have the new 'Canvas View' in Zoho Recruit?

    • Zoho Inventory - Move Orders

      Quick question about Move Orders... Why is there no status to say something like "Draft", "In Progress" and "Completed", similar to Transfer Orders? I'm assuming that when something needs to be moved it should be planned in Inventory, executed and then

    • Kaizen #215 - Workflow APIs - Part 3 - Create and Update Workflow Rules

      Welcome back to another week of Kaizen! Over the last couple of weeks, we’ve joined Zylker Cloud Services as they review and improve their workflows. In Part 1, we discovered and audited their sprawling workflow landscape. In Part 2, we learned how to

    • DataPrep Bigquery Connection failed

      Hello everybody, I want to create a connnection beetwen Bigquery and Dataprep but when I try to connect my project I got this error Loading tables has failed. Table list fetched from the data source expired.

    • Issue in Zoho People Regularization – Incorrect Hour Calculation

      I have noticed that when applying attendance regularization in Zoho People for previous dates, the total working hours are not calculated correctly. For example, even if the check-in is 10:00 AM and check-out is 6:00 PM, the system shows an incorrect

    • Allow Multiple usage units to items while adding them to sales/purchase transactions

      The usage unit of items added in zoho books are static right now and can not be changed. But certain items are received or sold in multiple usage units. One example is fabric. It can be bought in Meters, inches, kgs or other units. Another example would

    • PO receive quantities

      At last, Zoho has finally got around to allowing us to receive a larger qty than recorded in the PO :-) Saves us all from editing the PO's before receiving larger quantities ( usual for us ) ! It's still in "beta" but available upon request, I've tested

    • Analytics : How to share to an external client ?

      We have a use case where a client wants a portal so that several of his users can view dashboards that we have created for them in Zoho Analytics. They are not part of our company or Zoho One account. The clients want the ability to have user specific,

    • Reference Deal Categories in Deluge

      Hello, Is there a way to reference Deal Category in deluge functions? So for our Deals, we have several different WON stages in a pipeline.  Rather than type each stage into our functions, we'd like to be able to reference the Deal Category.  Similar

    • Users Name & Email in Reports

      Hi, I would like to show the Users Name from their Zoho Acount in All Entries/Reports as well as the current Account Email. Thanks Dan

    • Workflow Creation with Zia gets stuck

      It gets stuck here:

    • Unable to Add Asset to Work Order Due to Different Contact and Company

      Hello Zoho Team, I’m facing an issue in our environment related to asset linking in Work Orders. Here’s the situation: When our engineers go for field activities, they initially create the Work Order using the salesperson’s contact details. After completing

    • I NEED MORE CUSTOM FIELDS!!!

      Why can I only have 60 custom fields! It's not enough. I want another 100 extra custom fields to do what's necessary for my business! I'm sure I can't be the only one with this problem!!! How hard would it be to fix this? Just fix it for me please at

    • Zoho Webinar et Zapier : de la prise de rendez-vous aux relances — une automatisation performante

      Organiser un webinaire réussi et gérer efficacement les participants peut être un véritable défi. Avec Zoho Webinar et Zapier, vous pouvez rendre vos processus plus simples. Vous gagnez du temps en automatisant les tâches répétitives. Résultat : une expérience

    • Ticket Stages Report

      From data to decisions: A deep dive into ticketing system reports Ticket stages refer to the series of transitions from the moment a support ticket is created until it is closed. It moves through various stages based on the actions taken at each preceding

    • 【参加無料】今年最後のZoho ユーザー交流会｜東京・大阪・名古屋で開催！ 活用事例＆ユーザー同士の情報交換

      ユーザーの皆さま、こんにちは。コミュニティチームの中野です。 11月に東京、大阪、名古屋の3都市でZoho ユーザー交流会を開催します！ 毎回ご好評いただいている本イベントでは、実際の Zohoユーザーによるリアルな活用事例の共有や 参加者同士でノウハウを交換し合うグループワークを予定しています。 「他社の活用を参考にしたい」「Zoho をもっと使いこなしたい」方にぴったりの場です。 初参加の方もぜひお気軽にご参加ください！ ーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーーー

    • Slow Performance on desk.zoho.com. 11/3/2025

      I’m not seeing any active service alerts for desk.zoho.com, but everyone on our account is currently experiencing very slow load times when opening or navigating tickets. We’ve already tried the standard troubleshooting steps — clearing cache and cookies,

    • Create View to See Tickets Closed within the last 3 days

      I'm trying to create a view in Zoho Desk that shows me "recently closed ticket," which I will define as tickets closed in the last 3 days. I want this view to update so that whenever I click to view it is recalculates and shows me tickets closed within

    • Next Page