Important: Microsoft Outlook Bulk Email Updates

Important: Microsoft Outlook Bulk Email Updates

Dear Marketers,

We want to bring your attention to an important upcoming change announced by Microsoft (Outlook) that will impact users sending bulk emails to Outlook.com, Hotmail.com, and other Microsoft-hosted inboxes. This update focuses on strengthening email authentication to improve inbox security and reduce spam. These measures will help reduce spoofing, phishing, and spam activity, empowering legitimate senders with stronger brand protection and better deliverability.

Microsoft's New Requirements for Bulk Senders:

Microsoft is introducing new requirements for domains sending more than 5,000 emails per day. Starting May 5th, 2025, Outlook will begin enforcing stricter email authentication standards.

Key Changes to Be Aware Of:

  • Mandatory SPF (Sender Policy Framework): Your sending domain must pass SPF authentication. Ensure your domain's DNS record accurately lists all authorized IP addresses and hosts that send emails on your behalf.

  • Mandatory DKIM (DomainKeys Identified Mail): Your emails must pass DKIM authentication. This validates the integrity and authenticity of your emails.

  • Mandatory DMARC (Domain-based Message Authentication, Reporting, and Conformance): Your domain must have a DMARC record in place, and alignment with either SPF or DKIM (preferably both for optimal deliverability).

Impact on Non-Compliant Senders:

  • Initial Routing to Junk: After May 5th, 2025, emails from high-volume senders that do not comply with these authentication requirements will initially be routed to the Junk folder.

  • Future Rejection: Microsoft has stated that in the future, non-compliant emails will be rejected entirely to further protect their users.

Recommendations for Zoho Campaigns Users:

As users of Zoho Campaigns, especially if you send bulk email campaigns that might exceed 5,000 emails per day to Microsoft-hosted inboxes, it's crucial to take the following steps now to ensure your email deliverability is not affected:

  • Review Your DNS Records: Audit your SPF, DKIM, and DMARC records for the domains you use to send emails through Zoho Campaigns. Verify that they are correctly configured and accurately reflect your sending infrastructure.

  • Ensure SPF Passes: Confirm that your SPF record includes all necessary sending sources for Zoho Campaigns.

  • Ensure DKIM is Implemented: Verify that DKIM signing is properly set up for your sending domains within Zoho Campaigns.

  • Implement DMARC: If you haven't already, implement a DMARC record in your DNS. Starting with p=none allows you to monitor your email authentication results before moving to stricter policies.

  • Configure Custom Return Path: This dedicated custom return-path address allows you to receive detailed notifications about email bounces, enabling you to analyze delivery issues and proactively manage your email lists.

  • Follow Email Hygiene Best Practices: While not strictly mandatory yet, adopting the following practices will further enhance your deliverability and sender reputation:

    • Use compliant and valid "From" and "Reply-To" addresses.

    • Include functional and easily accessible unsubscribe links.

    • Maintain clean email lists and manage bounces effectively.

    • Practice transparent mailing practices with clear subject lines and proper consent.

Next Steps for You:

  1. Prepare Now: Review and update your SPF, DKIM, and DMARC records immediately.

  2. Help Resources: If you need assistance with setting up SPF, DKIM, or DMARC, refer to Zoho Campaigns's help documentation.

This update from Microsoft underscores the increasing importance of proper email authentication for ensuring reliable email delivery. By taking proactive steps now, you can safeguard your email campaigns and maintain strong deliverability to Outlook inboxes.

We will continue to monitor this situation and provide any further updates or guidance relevant to using Zoho Campaigns. Keep an eye on our community forums and announcements.

It's important to note that Zoho Campaigns will not impose restrictions on email sending; however, users are strongly encouraged to proactively implement these authentication measures on their end to maximize deliverability

If you have any questions or concerns regarding this, please don't hesitate to reach out to our support@zohocampaigns.com or engage in the community forums.

Happy Marketing!
Zoho Campaigns

 


      Zoho Campaigns Resources


        • Desk Community Learning Series


        • Digest


        • Functions


        • Meetups


        • Kbase


        • Resources


        • Glossary


        • Desk Marketplace


        • MVP Corner


        • Word of the Day


        • Ask the Experts


          • Sticky Posts

          • Marketer's Space: Proven tips to improve open rates – Part II

            Hello Marketers! Welcome back to another post in Marketer's Space! We're continuing from where we left off a fortnight ago. We ended the previous post discussing the subject line, and we'll continue from there. Let's dive right in. Pre-header Pre-header
          • Tip of the week 03 - Sending emails in batches

            Today's marketers not only want their email marketing to be efficient, but also smart. For an email campaign, you may think you have all the essential elements for lead conversion—a big mailing list, an attractive template design, and the most-engaging message content, but after hitting the ‘send’ button, you may not get the expected conversions. Wondering why? Here’s one of the major reasons. Many marketers miss out on sending the email campaign the right way. Did you know that you should not be
          • Tip of the week 04 - Know about your recipients' 'prime open time.'

            In today's market, the importance of customer behavior is astounding, with a vast amount of research and resources going into finding how customers make decisions. The process of persuading your customers to open your email and click on your call-to-action becomes easy when you understand the psychology behind their behavioral traits. Time to turn into a psychologist! Let's get to the basics—you want your emails to resonate well with your recipients. So, what's the primary thing involved here? It's
          • Zoho Campaigns Expert Diaries on SoundCloud, Spotify, Apple Podcasts, and YouTube

            Hi email champs,  As email marketers, we find great lessons in each other's works—be it the subject lines that worked good, the design that was received well, or the CTA that had the maximum clicks. Email marketing encompasses a wide variety of topics spanning everything from creation and design to development and deliverability.  Here's when we from the Zoho Campaigns team found the need to build an email marketing community comprising of seasoned marketers and email geeks who can help each other
          • Email Deliverability Tip #3: Seal the deal with the preheader

            In the last post, we learned about the subject line. Today we'll be learning about the preheader. A preheader is the short text that follows the subject line in an email. The preheader is designed to hint at what your email message is all about. A good preheader should act as a second subject line and convince your contacts to open the email. Now, let's learn the best way to craft a preheader. Your subject line and preheader should work together and accurately convey the gist of your email. Keep

          Zoho CRM Plus Resources

            Zoho Books Resources


              Zoho Subscriptions Resources

                Zoho Projects Resources


                  Zoho Sprints Resources


                    Zoho Orchestly Resources


                      Zoho Creator Resources


                        Zoho WorkDrive Resources



                          Zoho CRM Resources

                          • CRM Community Learning Series

                            CRM Community Learning Series


                          • Tips

                            Tips

                          • Functions

                            Functions

                          • Meetups

                            Meetups

                          • Kbase

                            Kbase

                          • Resources

                            Resources

                          • Digest

                            Digest

                          • CRM Marketplace

                            CRM Marketplace

                          • MVP Corner

                            MVP Corner




                            Zoho Writer Writer

                            Get Started. Write Away!

                            Writer is a powerful online word processor, designed for collaborative work.

                              Zoho CRM コンテンツ




                                ご検討中の方

                                  • Recent Topics

                                  • Configurable Zoho Cliq Notifications for Zoho People Alerts

                                    Hello Zoho People Product Team, Greetings and hope you are doing well. We would like to request an enhancement to Zoho People notifications, enabling a native delivery via Zoho Cliq with admin-level control, similar to the notification settings available
                                  • Looking back at Zoho Calendar in 2025

                                    Hello Zoho Calendar Community, As we step into a brand-new year, we’d like to take a moment to thank you for being an active and valued part of the Zoho Calendar community. Your trust, feedback, and continued engagement motivate us to keep evolving and
                                  • There was an error while connecting to GSTN

                                    I am trying to file GSTR1. Everything flows smoothly until I reach the final step of filing the return. After I enter the PAN and OTP for filing it raises the error "There was an error while connecting to GSTN"
                                  • Zoho Books Extension: What Happens If Custom Fields Already Exist?

                                    When developing Zoho Books extensions, what happens if the target Zoho Books organization already has a custom field with the same API name as one defined in the extension? I’m asking because we originally created an on-Books version of this functionality,
                                  • Internal Server Error (500) When Attempting to View Banking Transactions

                                    I am experiencing an Internal Server Error (500) when attempting to view transactions across all of my banking accounts. Despite multiple attempts to resolve this, I have received little more than runaround from support, and the issue remains unresolved.
                                  • How do I add a blank line to the Organisation Address Format?

                                    I'd like to have my VAT number, for example, shown prominently by having a clear gap between it and the address block above, but any blank lines in the address format get ignored in PDF outputs.
                                  • Automatic Invoice Number generation for createRecord

                                    Hello, while testing some custom Buttons in my Zoho Books application, I noticed that I get an error that previously did not occur. After some further digging I found that the automatic transaction numbering of invoices no longer work in my organization.
                                  • Adding number of days to an estimate.

                                    I need both QTY of item and "number of days hire" in my estimates at the line item level. Any clues as to how this is done would be greatly appreciated. It needs to calculate. Thanks J
                                  • Books Api: listing expenses created after certain dates

                                    Is there any parameter I can add to the List Expenses endpoint that will let me look up expenses by when they were created?
                                  • Why can't we change the Account type from an Expense to an Asset?

                                    Like the question. Why in QuickBooks for example if I mistakenly created an account as an expenses and I already captured information in those accounts, I can just change the account type from expense to asset
                                  • Is it possible to do validation for the Actions added to Reports?

                                    We have an all-around On Validate function that checks all the possibilities before the Created/Edited form submissions. We want to have a button in the report view, so we can change records without entering. We are able to add this button, and it does
                                  • [Free Webinar] Environments in Zoho Creator - Creator Tech Connect

                                    Hello Everyone, We’re delighted to kick off the 2026 edition of the Zoho Creator Tech Connect Series and are excited to continue this learning journey with you. The Creator Tech Connect series is a free monthly webinar featuring deep-dive technical sessions
                                  • Zoho Voice API SMS

                                    I made a post request in Zapier to try to send an SMS. Authentication appears to be configured correctly. I followed the documentation and I'm getting a 400 Error "Internal Server Error". Not helpful at all. Anyways, I could not find any information on
                                  • How do I change (error) display messages

                                    Hi! I would like to edit display messages like "invalid entries" and "enter a value for Nome" and so on into Italian language messages. How can I do that? Already tried on Validate on form submit. Where I am failing? Thanks in advance.
                                  • Record Overseas Transactions Along with CC charges

                                    Hi All, We receive payments via stripe in multiple currencies and stripe takes around 2.5% fees. The amount is settled in INR into our local bank. What should be the currency of the income account used for Stripe payments? Here is a sample flow that we
                                  • Easier onboarding for new users with stage descriptions

                                    Greetings, I hope all of you are doing well. We're happy to announce a recent enhancement we've made to Bigin. You can now add descriptions to the stages in your pipeline. Previously, when creating a pipeline, you could only add stages. With this update,
                                  • Pieds de page personnalisé - Document Zoho Writer

                                    Bonjour à tous, Je rencontre un souci avec l’ajout d’un pied de page personnalisé dans un document Zoho Writer. Je souhaite insérer les informations de mon entreprise (notamment un logo + adresse) dans le pied de page. Le problème, c’est que lorsque j’ajoute
                                  • Credit card transactions are backwards after importing statements

                                    I am new to Zoho Books so I'm importing my firm's bank and credit card statements in. My credit card statements have a single column with negative numbers so that is the option I chose. But when I went to categorize the credit card transactions, I can
                                  • Permissions on Views

                                    Having the option of any agent creating custom views is firing back and got a situation where there are a hundred different views across the team and tickets are not being dealt in the most efficient of ways. Tickets seems to be missed by some agents,
                                  • Function #8: Add additional charges to invoices

                                    Here goes one of the highly sought-after custom functions in Zoho Books. If you find yourself needing to apply additional charges to customers on their invoices (say credit card surcharges, or fuel charges applicable to customers from a certain region,
                                  • VIsual maindmaps in Zoho notebook Ai

                                    Can I create and export VIsual maindmaps in Zoho notebook Ai
                                  • 1stDibs Integration to Zoho Inventory

                                    Hello is it possible to integrate my Zoho inventory and 1stDibs?
                                  • Community Question: Renewal vs Invoicing

                                    This is a question for the community. Does anyone else consider there to be a difference between a subscription renewal event and sending out a recurring invoice for a subscription? For example, let's say customer XYZ purchases a 1-year subscription to
                                  • cloud console support for music websites

                                    Hi Friends, I am not from a very technical background.. So need support from the Zoho family. I want to build a e-commerce website which is in Musical Niche. It will help people learn music & play instruments of all types. There are a few players in the market like Chordify , Guitaa, Guitar Dashboard, ChordU & few others. But I all these websites allow only a few instruments  to play. So I want to build a better  website than the one I mentioned. So wnated to know what UI & AI should I use so that
                                  • Scheduled Reports - Do not send empty report

                                    Hello, We are intensively using reports in the CRM, especially for sales managers. When data is empty, they still receive an email. Can you add an option to avoid sending the report when data is empty?
                                  • Is Zoho One Desktop more secure than Zoho One Web SaaS?

                                    Is Zoho One Desktop more secure than using Zoho One in browser? Inherently, it seems desktop would be unless you don't do things like share your pw or leave pc on. I am concerned about data being on the cloud or someone else's server and database.
                                  • Reminder Settings - Time Tracker

                                    On the time tracker in Reminder Settings I created a reminder according to the Zoho manual. But a manager asked me to change the message that goes in the email. Is it possible to change the message? I didn't find that in the Zoho manual. Another question: I configured to receive the reminder everyone who logged in less than 40 hours. Does Zoho consider less than 40 hours of the current week or the whole month? Another situation, I put it so that I and another specific user would receive the notification,
                                  • Create Item group from a composite Item

                                    I have applied my mind for hours but cannot figure this out. Can you have a composite item in an item group?. E.g. We bundle different color and size SKU's together as composite items. Also Using composite items as Bill of Materials. We want to create
                                  • Main difference of Zoho Recruit Corporte version and Staffing HR vesion

                                    Hi Zoho, I need help to fully understand what is the main key point differences of Recruit Corporate version versus the Staffing HR version? We are currently using Corporate HR version and we are looking on having an insightful automated reporting, does
                                  • Out of Stock items showing in Commerce

                                    I have over 6000 items and most are not in stock, but all items are showing up in Commerce whether they are inventory or not. What option or feature can you use to hide items in Commerce at zero or negative quantities? I currently am using Commerce for
                                  • Is it possible to transfer data from one related list to another within the same module ?

                                    In the Leads module, there is an existing default Product related list that already contains data. Recently, I added a custom multi-lookup field, which created a new related list in the same Leads module. Now, I need to move the existing data from the
                                  • How to implement new online payment gateway?

                                    Hello, Can you tell me how to proceed to implement my local payment gateway? DIBS has an open avaiable API that should be easy to implement into ZOHO BOOKS. http://tech.dibspayment.com/dibs_payment_window
                                  • Formula working in MS Excel , is not working in Zoho Sheets, Filter fuction which is working in MS sheets per the attached workbook / Daily update.

                                    Filter function , which is working in MS Excel is not working in Zoho sheets. Please help on function of filter of particular class sheets and extract students name who has more than 3.5 hours of study hours on particular day depending on date in D7 cell.
                                  • New in Smart Prompt: Record Assistant for contextual assistance, and support for new AI models

                                    Smart Prompt helps teams stay informed and move faster by providing relevant suggestions where work happens in CRM. With this update, Smart Prompt becomes more adaptable to your organization’s AI preferences. You can now choose which Large Language Model
                                  • Improved Integration Failure Information (And Notification Options)

                                    Hi, When an attachment service for example fails, you just get "Field x - Error", I can check the field it is failing on and find nothing wrong, same file size, type, dimensions, etc. so more information as to the actual issue would be helpful. And an
                                  • Change User Role in a Form

                                    Hi, When in a form, it would be good (And consistent) to be able to change the user role/permission like you can with Shared Reports, All Entries or the actual User itself, rather than having to delete the users permission and then add it back again with
                                  • Reassign Partially Saved Entries

                                    Hi, I would like to be able to go to Partially Saved Entries and like the option to delete them I would like the option to multi-select and be able to reassign them to another user to complete (Such as when a user has left the company). Thanks Dan
                                  • Increase the "Maximum Saved Entries per User" Options Limit

                                    Hi, You can create lots of saved entries, yet the Limit when you apply one is 25, we may often expect 32 to be in draft, and therefore want to enforce that, can we increase the limit of this field from 25 to 100 (As you can just turn it off and have more
                                  • Product Updates in Zoho Workplace applications | December 2025

                                    Hello Workplace Community, Let’s take a look at the new features and enhancements that went live across all Workplace applications this December. Zoho Mail Block emails without notifying the sender Block emails without sending a rejection notification
                                  • Zoho CRM for Gmail Extension Not Working in Brave Browser?

                                    Is anyone able to get the Zoho CRM Chrome Extension working in the Brave browser? They're both built on the Chromium platform and every other Chrome Extension works with the exception of Zoho CRM for Gmail so any ideas here?
                                  • Next Page