Zoho CRM Error message #2 : Fixing [Invalid Credentials] and [Authentication Fail] while configuring IMAP

Zoho CRM Error message #2 : Fixing [Invalid Credentials] and [Authentication Fail] while configuring IMAP



Hi Everyone!

As a part of our Zoho CRM Error messages series, we're going to focus on couple of error messages that you might encounter while configuring IMAP and ways to resolve them. These are:

  • [Invalid Credentials]

  • [Authentication Fail]

 

The annoying part is that sometimes you get these error messages despite entering the correct credentials. Troubleshooting these errors start with understanding the root cause of these errors. You get these errors when:

  • TFA (two factor authentication) is enabled for your account

  • An previously saved password gets auto filled while configuring but you changed the account password recently.

  • When an incorrect server name is entered. For e.g., the user might be in zoho.eu domain but entered the domain name as zoho.com.

 

How can you resolve these errors?

  • If TFA is enabled: Generate app specific password for your email account from the "Two Factor Authentication" section in your Zoho Accounts page and use the same for IMAP configuration. More on that here.

       

       

 

 

  • Password auto fill: If a previously saved password gets auto filled and you have changed the password since then, ensure you retype the password manually while configuring.

  • Ensure you use the correct hosted server name while configuring IMAP.

  • Ensure you are logged in to web mail while configuring the IMAP.

 

Hope this helps resolve the error messages encountered while configuring IMAP. If the issue persists, do post in our community or contact our support team for the fix. 

We will continue to add more fixes to other prominent error messages in the coming weeks. Stay tuned!

Check the steps for resolving connection errors while configuring IMAP here.




      • Sticky Posts

      • How to reach the official Zoho Support channels and avoid fake ones.

        Dear Customers, Thanks a lot for choosing Zoho! Our applications are built to help achieve your day-to-day business goals. We are committed to engaging with you, to understand and develop solutions that enhance your productivity.  We are happy and ready to help you use our services effectively. Understanding and avoiding fake support Just like using popular bank names and financial applications for phishing purposes, using Zoho and claiming to be providing Zoho Support or services with false numbers

      • Function #35: Close all tasks associated with a lead and create a new task.

        Welcome back everyone! Last week, we learnt how to close all tasks of a deal depending upon the deal stage. This week, let's look at a custom function that lets you close all of the tasks associated with a lead while simultaneously creating a new task, like when you need to halt all progress towards a lead while the lead is not available at the moment but create a reminder task. Business scenario: The success of a company, in one way or another, is determined by the leads it gets. Each lead is just

      • Zoho CRM Webinar - Redesigning Daily User Experiences with Canvas

        <br> Your users across roles use the CRM for day-to-day tasks that are necessary. Whether they perform their tasks on time, the right way, or at all depends on a lot of factors, including User Experience. Many businesses struggle with rigid layouts,

      • Join us at the Canada ZUG Meetup: What’s New in Zoho CRM

        Hello Zoho Community! Start your year with fresh insights into Zoho CRM’s latest updates and tools. Whether you're a CRM beginner or a experienced user, this meetup is crafted to help you optimise your processes and leverage new features. Explore practical

      • CRM Hack #2: Automate sending of birthday greetings to your customers.

          Hello everyone! What sets you apart as a sales person is your ability to add that personal touch to your business relationship with your customers. Sending a gift on a special day, or leaving a note wishing them on their birthdays, are small, yet significant actions that show your customers that you care. And these are actions done without any expectations :) You must be engaging with a lot of customers and it is highly unlikely that they all are your friends on Facebook or some social channel,

        • Recent Topics

        • Bigin Android app update: Zoho Books integration

          Hello everyone! We’re excited to introduce Zoho Books integration on the Bigin Android App. Once the integration is completed in the web(bigin.zoho.com), the Zoho Books tab will be visible in detail View of Contacts, Companies, and Pipeline records. The

        • IMAP Migration from Gmail

          I have been trying to import my email from a Gmail server and keep receiving the following error. I have reduced the security, activated imap and no improvement. The link to the Google support item has not helped. Unable to connect to your account. Please

        • Your Incoming has been blocked and the emails will not be fetched in your Zoho account and POP Accounts Click here to get unblocked.

          When entering my account, this error is thrown at me, and I deleted a good part of my deleted messages, but I still can not unblock it, I would appreciate your help. reservas@lineasperutravel.com

        • Email login error

          Login successfully but email page error

        • I want to add my other zoho account in same pc

          why does zoho restrict me doing many things as i also want to add my second mail account bit its not allowing me to do that

        • Request for Creating Multiple Email Accounts on One Mobile Number

          Dear Zoho Team, I am planning to shift all my work-related communication to Zoho Mail because of its reliability and features. For my work, I need to create 3–4 separate email accounts for different purposes. Could you please confirm if it is possible

        • Automatically Add Recurring Zoho Meeting Events to Zoho Calendar / Zoho Meeting Calendar

          Hello Zoho Meeting Team, Hope you are doing well. We would like to request an enhancement regarding recurring meetings created inside Zoho Meeting. At the moment, when we schedule a recurring meeting in Zoho Meeting, it does not appear in Zoho Calendar

        • Signature issue

          Problem: The signature does not appear when replying or forwarding an email. solve issue: settintgs/Signature Check option place a signature above the content with quotation marks

        • Unable to Receive Emails on Zoho Mail After Office 365 Coexistence Setup – Error: 553 Relaying Disallowed

          Hello, My domain name is bigniter.com, and I’ve been using Zoho Mail as my email service provider without any issues. Recently, I followed the steps outlined in the Zoho documentation to enable Coexistence with Office 365: 🔗 https://www.zoho.com/mail/help/adminconsole/coexistence-with-office365.html#multi-server

        • mail admin not loading

          i am trying to login to mailadmin ... gears keeps rotating forever... its not a password issue whats so ever ... not cookies issues whatsoever from android app i can login but there so few things to do from there .. i changed ip address the same... i

        • Unify All Zoho Video Meeting Experiences into One Standardized Platform

          Hi Zoho Team, We would like to share an important user experience concern regarding the current state of video meeting functionality across the Zoho ecosystem. The Problem Within Zoho, there are multiple ways to initiate or schedule a video meeting: Zoho

        • Unify All Zoho Video Meeting Experiences into One Standardized Platform

          Hi Zoho Team, We would like to share an important user experience concern regarding the current state of video meeting functionality across the Zoho ecosystem. The Problem Within Zoho, there are multiple ways to initiate or schedule a video meeting: Zoho

        • Unify Overlapping Functionalities Across Zoho Products

          Hi Zoho One Team, We would like to raise a concern about the current overlap of core functionalities across various Zoho applications. While Zoho offers a rich suite of tools, many applications include similar or identical features—such as shift management,

        • Zoho One Backup of entire account

          Hello, When using Zoho one is there a way to backup your entire account of all apps that you are using \ activively using in a single step or do you have to backup each applications data individually? Thanks,

        • CRM Mobile reports

          When our engineers finish a job they like to email the customer a job report. This is best done todate as an email template but we can find no way to include an image field from that module. Is there any other options?

        • why cant i access my email account. it keeps asking me for reverifiying my account by entering my password.

          I cant access my account. it keeps asking me for reverifcaton by entering my password. once its entered it asks for it over and over.

        • Issue with “CC” and “Subject Details” of the initial mail when reply / replied all / forward using Zoho Mail Client (Desktop / Web Mail / Mobile App)

          It is observed that when I reply / reply all / forward a mail using Zoho Mail Client (Desktop / Web Mail / Mobile App), the “CC” and “Subject Details” are omitted from the mail which was replied/forwarded. However this is not the case with outlook mail

        • Unable to send Emails - 452 4.3.1 Temporary System Error

          Whene ever i request smtp server to send the email (without attachment). i recieve error "452 4.3.1 Temporary System Error"

        • I can't receive email

          I cannot receive any email sent to my Zoho email after the free upgrade plan trial is finished.

        • Help for the alisa adding

          Sorry, I would like to add a paypal alias on my domain email address. However, the system blocked it. How can I do it?

        • Problem with Writer and Workdrive

          Hi team, I’m the super admin for our Zoho One org. WorkDrive is active, and Zoho Docs is deprecated for our org. However, Zoho Writer cannot connect to WorkDrive at all — we’ve cleared cache, tried incognito, and restarted several times. I was able to

        • Lite plan attachment said 250mb but actually 25mb ?

          Lite plan attachment said 250mb but actually 25mb ? I can't attach over 25mb files, and can't receive mails has attached files over 25mb too

        • How to change a BAS that has been filed

          I have discovered that a group of expense transactions were accidentally placed in a asset account rather than an expense account. As a result I need to adjust the transaction and consequently most of my BAS to correct the error. Because the BAS have

        • Zoho Books | Product updates | August 2025

          Hello users, We’ve rolled out new features and enhancements in Zoho Books. From the right sidebar where you can manage all your widgets, to integrating Zoho Payments feeds in Zoho Books, explore the updates designed to enhance your bookkeeping experience.

        • Closing Accounting Periods - Invoice/Posting dates

          Hi, I have seen in another thread but I'm unsure on how the 'transaction locking' works with regards to new and old transactions. When producing monthly accounts if I close December 24 accounts on 8th Jan 25 will transaction locking prevent me from posting

        • Feature Request: Email Follow-Up Sequences Similar to Zoho CRM

          I’m wondering if Zoho Recruit is planning to introduce a feature similar to the Email Automation – Follow-Up Sequences that is available in Zoho CRM. In CRM, this allows users to send a series of timed follow-up emails triggered by specific actions (for

        • 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

        • Zoho Projects - Task Owner filter at Project level

          Hi Projects Team, The feature requests I would like to raise is the ability to create a custom view at the project level for projects with tasks owned by a user or users. For example "Ashley's Projects" custom view might contain a list of project in which

        • Good news! Calendar in Zoho CRM gets a face lift

          Dear Customers, We are delighted to unveil the revamped calendar UI in Zoho CRM. With a complete visual overhaul aligned with CRM for Everyone, the calendar now offers a more intuitive and flexible scheduling experience. What’s new? Distinguish activities

        • Create an Eye-Catching Announcement Widget for Your Help Center

          Hello Everyone! In this week’s edition, let’s explore how to keep your customers updated with exciting news in the Help Center. See how ZylkerMobile wowed their customers by bringing updates right to their portal. ZylkerMobile, the renowned brand for

        • 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

        • API Pagination Error: 'from' Parameter Limit

          Hello, I am encountering an error while paging through the Zoho Desk API results: Status code: 422 - {"errorCode":"UNPROCESSABLE_ENTITY","message":"The value passed for field 'from' exceeds the range of '0-4999'."} Is 5000 the maximum number of records

        • Changing Account in Quote form does not update address information.

          I am trying to update the address information in a quote I've created. I corrected the address in the "Account" but that did not change in the quote. If I re-enter the Account Name in the Quote form, nothing updates. How do I fix this?

        • Old vs New Value for Deleted Lookup Values

          Suppose the following scenario, where a value in a lookup is deleted: 1. User has countries form 2. Form A has a lookup to countries form 3. User selects Italy in Form A and saves it with the Italy ID 4. Form A report shows Italy 5. Italy is inadvertently

        • Send mass email using my secondary email

          Hello, When I send an email to just one person from Zoho CRM, a complete email editor appears, where I can choose which of my email addresses I want to use in the From field. When I send a mass email, there is not such option. I can only select the email template. When I configure an email template, I can choose who is in the From field, but I can't set it to use my secondary address. The only way to send a mass email using my secondary address that I can think of is swapping my two addresses in

        • List of hidden features

          Hi Friends, I had another support chat today and low and behold the feature that I wanted just simply needed to be "enabled". I thought I'd share, and maybe see if others had some similar experiences. 1. This one is from 5 ish years ago. I asked if there

        • Items Below Reorder Point Report?

          Is there a way to run a report of Items that are below the Reorder Point? I don't see this as a specific report, nor can I figure out how to customize any of the other stock reports to give me this information. Please tell me I'm missing something s

        • customize payment page

          Is there a way to customize, other than the theme colour, the payment page that customers are taken to from invoices? I can't seem to find a way. I just don't like the formatting of the current page and would like to make it look better. I've looked at

        • Are Environments Worth It?

          In concept, Environments in ZC is a great idea. I think the flow is pretty smart when you compare it to GitHub, especially for a low code audience. However, in practice, I've found it to be unpredictable, and I've only used it a few times. Aside from

        • Enhanced duplicate check for Leads in CRM

          Hello Everyone, We are excited to announce that you can now check for duplicate entries in leads by comparing them with similar records in the Contacts Module. Previously, when you added a lead, only the converted leads were checked for duplicates. This

        • Next Page