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

    • Kiosk Button Actions

      I need to add an action to a Kiosk Button to loop me back to start the kiosk again and I am not sure what that looks like (function, etc.).

    • Support www.camcard.com

      Hi, Is it possible CRM Zoho have integrations with https://camcard.com/? Thanks Br, Andy

    • Option to Customize Career Site URL Without “/jobs/Careers”

      Dear Zoho Recruit Team, I hope you are doing well. We would like to request an enhancement to the Career Site URL structure in Zoho Recruit. In the old version of the career site, our URL was simply: 👉 https://jobs.domain.com However, after moving to

    • Can't make a document editable to anyone

      Hey everyone, I am using Zoho Workdrive and trying to share a document so that it is editable by anyone with the link. I am trying to convince people to shift from Google to Zoho, but they don't have accounts yet. When I try to change the share settings

    • Edit Default Print

      What I want to do is create / edit the "Default Print" template without changing the layout I'm using. Currently I can create "Email Templates" but I don't use them for emailing and getting to that selection takes multiple clicks. If an email template could be set to be the Default Print template that would be helpful. I'd also like to print these in bulk but don't see that option (there is a mail merge macro but that goes straight to emailing, not to print or PDF).

    • Widget shows error

      Hi， May I ask why below characters will be auto added into the widget link and how to solve this error? As my widget shows 404 error now. ?serviceOrigin=https%3A%2F%2Fcrm.zoho.com&frameorigin=https%3A%2F%2Fcrm.zoho.com

    • How to print envelope labels from Zoho CRM

      Can anybody give me any clue how to print envelope/package labels directly from Contacts view? Regards, Alexandru Moderation Update: The Canvas Print View, which also facilitates the formatting of mailing labels, is now available! Learn more here: Zoho

    • Data Import: New interface, improved field mapping, and more

      Hello everyone! We’ve redesigned the data import process to ensure accurate field alignment and verify that every column in the uploaded file maps correctly with Desk fields before import. Here's how: Streamlined Import Steps Importing data is now more

    • Address labels

      Hi, we've been searching for a long time for a simple way for our employees to print address labels using a Dymo Label Writer 450. We came up with two alternatives that work, bur aren't really optimal.  First one is WebMerge. Webmerge is a great application that does 100% what we need but it is way too expensive for our needs. We only need to print a couple of labels per month. The second one is the integrated print tool in Zoho CRM, (Print preview) You would think this is the obvious way to do this

    • Print Labels

      How can I configure my address to print my labels like this: Name Mailing Address Mailing City, Mailing State Mailing Zip Country Instead of: Name Mailing Address Mailing City Mailing State Mailing Zip Country Thanks!!!!

    • Mailing labels - Improperly formatted

      All I'm trying to do is print one, properly formatted, mailing label. I'm in the Contacts module. In the default "list view" for mailing labels I selected a single client, hit the "more actions" drop down and selected print mailing label. Unfortunately,

    • Printing mailing labels

      The ability to print mailing labels would seem to be an important, basic, function of a good CRM. I find it very surprising that this has still not been addressed adequately by Zoho. When trying to use the existing "mailing label" included: 1. the data

    • Pageless mode needed to modernise Writer

      When we switched from GSuite to Zoho, one of the easiest apps I found to give up, was Docs. In many ways, Writer has always been more powerful than Docs, especially in terms of workflows/fillable forms/etc. However, I went back into Docs because I notice

    • Zoho Projects - Visual improvement to parent and sub-task relationship

      Hi Projects Team, My feature request is to improve sub-task visibility. Please see screenshot below. I really think parent child relationships could be visually improved. Even if the first letter of the parent task was inline with other same level tasks

    • AI Interview Insights: Turn Recorded Interviews into Quick Transcripts & Summaries

      Evaluating interviews shouldn’t require replaying long recordings or taking manual notes. With AI Interview Insights, you can now review complete transcripts and AI-generated summaries of your One-way (Recorded) interviews right inside Zoho Recruit. This

    • API method to get activity feed in Recruit

      Hi community, I'm trying to figure out - is there any API method tto get information about datetime when Recruit/Candidates record tag where added?

    • Printing Mailing labels

      Is there any way to adjust the size of the printing labels? or product would I use to print labels from Zoho? Thanks, Josef Krieger Moderation Update (14th April 2025): We have another post discussing the same topic with votes and feedback from users.

    • How many groups in Zoho Mail can I make?

      I'm currently on the free plan, which has a limit of 10 users. Does that limit includes groups too? If not, what is the limit for groups? Thanks!

    • Default to Current Date

      I'm importing data from a excel spread sheet that does not have date column and I'd like the date column in the Zoho Database to default to the current date. Any way I can do this?

    • "Spreadsheet Mode" for Fast Bulk Edits

      One of the challenges with using Zoho Inventory is when bulk edits need to be done via the UI, and each value that needs to be changed is different. A very common use case here is price changes. Often, a price increase will need to be implemented, and

    • Dropshipping Address - Does Not Show on Invoice Correctly

      When a dropshipping address is used for a customer, the correct ship-to address does not seem to show on the Invoice. It shows correctly on the Sales Order, Shipment Order, and Package, just not the Invoice. This is a problem, because the company being

    • Different Company Name for billing & shipping address

      We are using Zoho Books & Inventory for our Logistics and started to realize soon, that Zoho is not offering a dedicated field for a shipping address company name .. when we are creating carrier shipping labels, the Billing Address company name gets always

    • What's New in Zoho Inventory | Q2 2025

      Hello Customers, The second quarter have been exciting months for Zoho Inventory! We’ve introduced impactful new features and enhancements to help you manage inventory operations with even greater precision and control. While we have many more exciting

    • Make Packages from multiple sales order of a single customer

      Our customers sends orders to us very frequently, some times what customer wants is to ship items from 5 to 6 sales orders in a single shipment. it will be very nice if, zoho can implement this function, in which we can select items from other sales orders of the customer.

    • Update CRM Price Books to include volume discounts as per Zoho Books/Inventory

      Once again, Zoho has 3 great products that all store information in different ways (which is not helpful when you attempt to integrate the 3 products - one of the best features of Zoho). Zoho CRM Price Books are basic at best. Zoho Books/Inventory Price

    • Print a price list or price book

      Hi Community. Am I right in concluding that Zoho has no functionality to print a price list from either Zoho CRM, Zoho Inventory or Zoho Books? I won't get stuck on the fact that Zoho doesn't sync price books between Zoho CRM and Books/Inventory (more

    • Start Workflow from Deluge Script

      I have developed a customized process from our CRM that leverages a deluge script to create a statement of work document. Once the document has been created via the merge and store function, I would like the ability to start a workdrive review & approve

    • Add System Pre-Defined Lookup Field to Subform?

      Hi there! New to using Zoho, so this may already exist, but I'm having trouble figuring it out. Is there a way to get the system pre-defined Account Lookup field (in our case, renamed to Company Name), as the starting point for a subform? In our company,

    • Global lists for Multi select

      It would be great if I could select a global list to use for a multi select dropdown filed.

    • Show Custom Button in Portal Listview Canvas

      I have created a custom button that shows in a list view of deals (internally I can see it). I have permissions to allow this button on the portal. But it is not displaying in the canvas list? Before I do too much leg work, is this function allowed?

    • Zoho Survey Enhancements

      We love Survey. We use it a ton. It needs some enhancements. Maybe some of these are already on the roadmap? API - this is crucial. We have some complex surveys that take place and need to update records, trigger other functions/automations, etc. I would

    • Work Order Assignment for Engineers Handling Their Own Requests

      I’m setting up FSM for a business where there are multiple engineers, but each engineer handles their own process end-to-end receiving the service request, creating the work order, and completing the field service job. I noticed that I must create an

    • Zoho Sites "pages" management page

      I have 80 plus pages on zoho sites. When I go to the "pages" link to view and edit pages, They are not in any kind of order, so I spend lots of time searching for pages when I need to edit or create new. How can I change the view order of all my pages

    • AI feature in Zoho Desk suggesting answers based on past ticket threads

      Hi I would like to suggest something that would be very useful : instead of suggesting answers based on the Knowledge Base, I think it would be great if Zia could analyze the history of all customer and agents threads, to suggest answers in new tickets.

    • Advanced Customization of the Help Center using JavaScript

      Hello everyone, The Help Center in Zoho Desk can be customized by using HTML and CSS to provide structure and enhance the page's appearance—but what if you want to add interactive and dynamic elements? You can add these effects with JavaScript, a programming

    • Using a CRM Client Script Button to create a Books Invoice

      Hello, I need help handling error messages returned to my client script from a function. The scenario I have setup a client script button which is available from each Deal. This CS executes a crm function, which in turn creates an invoice based on the

    • Using IMAP configuration for shared email inboxes

      Our customer service team utilizes shared email boxes to allow multiple people to view and handle incoming customer requests. For example, the customer sends an email to info@xxxx.com and multiple people can view it and handle the request. How can I configure

    • Introducing Zoho POS for the Kingdom of Saudi Arabia

      Hey everyone, We are excited to kick-start December with a completely personalized edition of POS for retail businesses in Saudi Arabia to help run your operations with ease. It offers four different subscription plans—Free, Standard, Professional, and

    • Whatsapp Connection Status still "Pending" after migration

      Hello, I migrated my WhatsApp API to Zoho from another provider a day ago. So far the connection status is still “Pending”. There is a problem? How long does it usually take?

    • Unveiling Zoho Sites 2.0 - A new dimension in website building

      Dear Zoho Sites Users, We are thrilled to announce the launch of Zoho Sites 2.0 today! This refresh represents a significant step forward in the capabilities of Zoho Sites and is crucial for creating a lasting and positive impact on our customers' businesses.

    • Next Page