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

    • Writing SQL Queries - After Comma Auto Suggesting Column

      When writing SQL Queries, does anyone else get super annoyed that after you type a comma and try to return to a new line it is automatically suggest a new column, so hitting return just inputs this suggested column instead of going to a new line? Anyone

    • Finding rhythm through poetry

      Poetry has long been a powerful form of expression, discovery, and reflection. For many, it is a way to pen down their thoughts and experiences. The "poetic license" allows writers to shape their words with rhythm and flow. This year, on World Poetry

    • Zoho Desk Ticket SLA Level

      Hello, we have 2 levels of SLA escalation for our Tickets. Is there a way to display on the ticket information the level of SLA escalation the ticket currently on? I am aware that we can see in the ticket history the level of escalation that has been

    • Allow Font Size 11 in Editors...

      That is basic functionality...

    • Darshan Hiranandani : How many participants can join a Zoho Meeting at once?

      Hi everyone, I'm Darshan Hiranandani, trying to find out the maximum number of participants that can join a Zoho Meeting at once. Has anyone here used Zoho Meeting for larger groups and can share their experience or knowledge about the participant limit?

    • 【まだ間に合う！】Zoho ユーザー交流会 | AI活用・CRM・Analytics の事例を聞いて、ユーザー同士で交流しよう！

      ユーザーの皆さま、こんにちは。コミュニティチームの藤澤です。 3月27日(金)に東京、新橋で開催する「東京 Zoho ユーザー交流会 NEXUS」へのお申し込みがまだの方は、この機会にぜひお申し込みください！（参加無料） 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 イベントの詳細はこちらから▷▷ https://www.zohomeetups.com/tokyo2026vol1#/?affl=communityforumpost3 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

    • Where is the scheduled report in New UI?

      Hi Team, Seems there is not such a field in New UI, hence I have to switch to old UI to handle request..

    • Building a Simple Raspberry Pi + Keypad IoT PoC with Zoho Flow

      I want to share a simple IoT PoC I recently built that connects a Raspberry Pi to Zoho Flow and Zoho Creator. The goal was to send PIN input data from a hardware keypad to Zoho and trigger a servo and buzzer for visual/audible feedback. This can serve

    • Enable integration of CRM CPQ functionality for ZohoOne customers using Zoho Finance application

      Hi there. I can't believe I'm needing to launch this idea as I would have thought this was a little obvious. Following a number of conversations with the technical team it's become evident that the CPQ functionality within CRM cannot integrate with Zoho

    • What's New in Zoho Billing | January 2026

      Excited about the latest enhancements in Zoho Billing? Our January updates bring an intelligent AI assistant, smarter subscription management, and improved tax compliance, saving you time and reducing manual work. Dive into the details below to see how

    • Is there a way to sell in a practical method multiple subscriptions of the same product? i.e. domain names

      In evaluating Zoho Billing, a hurdle to adopting it is that Zoho Billing does not seem designed to support businesses that sell multiple subscriptions of the same product. In our case, we need to sell and manage several domain names per client. Am I right

    • Zoho Writer Frequently not loading

      I've reported this as a problem already but I can't log into my email right now or get onto the main site so you're going to hear about it again here: at least once a week, Zoho Writer will just refuse to load entirely. The main page will load and load

    • Update P_Leave: code: 7052 "Employee_ID": "Enter Employee ID"

      Hi, Zoho People - Update Leaves Can someone assist? ------------------------------------------------------------------------------------------ col = Collection(); col.insert("recordid":id); col.insert("Date_Check_Approval":zoho.currentdate); info zoho.people.update("P_Leave",col.toMap());

    • Can't change form's original name in URL

      Hi all, I have been duplicating + editing forms for jobs regarding the same department to maintain formatting + styling. The issue I've not run into is because I've duplicated it from an existing form, the URL doesn't seem to want to update with the new

    • Can't rename groups on Mac desktop app

      I'm working on an up-to-date Mac with a freshly downloaded Notebook app. I'm trying to rename a group within a notebook. Here I have, left to right, a note, a group, and a note. I select the group. On the top left, I select Action. On the dropdown, "Rename"

    • Custom CSS for Zoho CRM Team Bookings embeded widget

      Hello, we are adding Zoho CRM Team Bookings (crm.zoho.com) in our public website. We know that we can change Theme Color, Font Color and Background Color: Zoho CRM Booking Styling But is it possible to change other CSS attributes e.g. Font Family, like

    • Strange behavior in CRM Number Field – Characters allowed but not "e"?

      Hi everyone, Has anyone faced this strange issue in Zoho CRM? In a Number field, it is possible to type some characters, but the character "e" cannot be entered. This was really surprising to me. Normally, a number field should restrict all characters

    • Best Way to Manage Approvals Within Blueprint Stages?

      Hi, I am working on a requirement involving Blueprint and approval logic in Zoho CRM and would appreciate some guidance. I understand that approval processes do not trigger when a record is currently within a blueprint, which makes it challenging to implement

    • Marketing Tip #25: Grow your social presence with a simple posting routine

      Consistency is one of the biggest growth drivers on social media. Regular content keeps your store visible and helps customers remember you. Even 3–4 posts a week can build momentum over time. The easiest way to stay consistent is to stop trying to create

    • How to add "All Open AND Overdue" back to the Home Page Task Component?

      Hi everyone, I’m looking for a way to restore the Tasks component dropdown list on the Zoho CRM Home Page. Since the recent update to the Task area in my Home Page Classic View, the dropdown options (e.g., My Next 7 Days + Overdue) are too restrictive

    • Duplicate Leads Concerns with Round Robin and Lead Approval Process

      It is great to have the Duplicate Lead Approval Process,  there are a few issues with the process that I would greatly appreciate taken consideration in enhancing. It appears that A Lead comes in Lead owner assigned by the Round Robin Check for Duplicate, If the lead is a Duplicate the Lead owner gets an email of a duplicate needs approval email assign to the approval process      This causes problems, The duplicate approval process is done by a different level person, they do not get the email notification

    • Dashboard target enhancements

      Often individuals in IT are creating dashboards for their sales team. The ability to create a single dashboard that can be used by multiple people is key. A components for a dashboard have the ability to filter by logged in user which is great. However

    • How to update "Lead Status" to more than 100 records

      Hello Zoho CRM, How do I update "Lead Status" to more than 100 records at once? To give you a background, these leads were uploaded or Imported at once but the lead status record was incorrectly chosen. So since there was a way to quickly add records in the system no matter how many they are, we are also wondering if there is a quicker way to update these records to the correct "Lead Status". I hope our concern makes sense and that there will be a fix for it. All the best, Jonathan

    • Bring your own credentials (BYOC) for connections in Zoho Creator

      Hello everyone, We're excited to announce an important step forward in how integrations and authentications work in Zoho Creator. Zoho Creator is a versatile platform for integrations, enabling you to connect with thousands of third-party services using

    • CRM x WorkDrive: File storage for new CRM signups is now powered by WorkDrive

      Availability Editions: All DCs: All Release plan: Released for new signups in all DCs. It will be enabled for existing users in a phased manner in the upcoming months. Help documentation: Documents in Zoho CRM Manage folders in Documents tab Manage files

    • Project Management Bulletin: March, 2026

      We are passionate about equipping our users with efficient solutions that help them run their businesses successfully. Our collective efforts over the past 2 years have culminated in the launch of Sprints 3.0— built with reliable features, impactful integrations,

    • Composite items inside of composite items; bill of materials needed

      Hi Zoho and Everyone, I am evaluating whether Zoho Inventory will work for my small business. I grow and harvest herbs and spices but also get from wholesalers. I use all these items to make herbal teas, but also sell them as individual items on my Shopify store and Etsy. I discovered the composite item bundling and am wondering if I could get some assistance since there is no bill of materials: Our herbal company's best selling tea is a sleepytime tea. Sleepytime Tea can be purchased in three weights

    • Automation Series: Sync Task Status with Zoho Desk Tickets

      In Zoho Projects, you can automatically close and reopen an associated Zoho Desk ticket when the status of a task is changed. This syncs the current state of the task with the support ticket without manual updates. For instance, a support team handling

    • Auto-Generate Line Numbers in Item Table Using HTML & CSS Counters (Zoho Books & Zoho Inventory Custom Templates)

      <div> <style> /* Start counter from 0 inside tbody */ tbody#lineitem { counter-reset: rowNumber; } /* Increment counter for each row */ tbody#lineitem tr { counter-increment: rowNumber; } /* Show counter value in first column */ tbody#lineitem tr td:first-child::before

    • Does zoho inventory need Enterprise or Premium subsrciption to make Widgets.

      We have Zoho One Enterprise and yet we can't create widgets on inventory.

    • Introducing Radio Buttons and Numeric Range Sliders in Zoho CRM

      Release update: Currently out for CN, JP, AU and CA DCs (Free and standard editions). For other DCs, this will be released by mid-March. Hello everyone, We are pleased to share with you that Zoho CRM's Layout Editor now includes two new field formats—

    • New UI for Writer - Disappointed

      I've been enjoying Zoho Writer as a new user for about 6 months, and I really like it. One of my favorite things about it is the menu bar, which you can hide or leave out while still seeing most of your page because it is off to the left. I think this

    • Zoho CAMPAIGNS working hours

      Hi I use Campaigns Automation workflows to automate follow-ups to my Leads. I discovered this weekend that emails are being sent out on Sundays. How do I limit my Campaigns outgoing emails to business working hours? This is very important! Thanks, D

    • Depositing funds to account

      Hello, I have been using Quickbooks for many years but am considering moving to Zoho Books so I am currently running through various workflows and am working on the Invoicing aspect. In QB, the process is to create an invoice, receive payment and then

    • Create Receipt of a Donation (not a sale)

      We are a non-profit organization that receives general donations. How do I create a receipt of payment for the donor and categorize the payment as a Gift? I tried the method of creating an invoice; however that automatically created a "Sales" transaction

    • Function #2: Create a Deal in Zoho CRM when an Estimate is created in Zoho Books

      For those who use Zoho CRM integrated with Zoho Books, here's a nifty function that helps you optimize your sales process by adding a Deal in Zoho CRM whenever an estimate is created in Zoho Books. Custom Function: To create the custom function, go to

    • New Custom View -Sorting the Custom fields

      While creating a New Custom View in invoice , Customers, Bills ,expense etc , the sorting of custom fields are not available , a query function "order by / sort by  " may also be included in  Define new criteria module  which will be more beneficial to

    • Grouping Undeposited Funds to Move to other accounts

      In the bank option it would be nice to check what transactions in undeposited funds I want to move to other accounts. Then while checking this it can accumulate totals and created whats essentially a deposit slip. Once the transaction is moved it should

    • Sync your CRM Tasks with Zoho Projects

      Zoho Projects integration with Zoho CRM helps you manage your tasks more efficiently. You can create all project related activities right inside your CRM using this integration. Create new portal or associate an existing portal, add projects to the portal,

    • Zoho CRM strips whitespace in text fields

      When editing field text with multiple spaces: CRM - both UI and API trim / compress the whitespace to a single space when saving: Is this known / expected / documented behaviour?

    • Next Page