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

    • Enhanced Recording Permission Controls for Zoho Cliq Meetings (Similar to Zoom)

      Hello Zoho Cliq Team, We hope you are doing well. We would like to request an enhancement to the recording permission functionality in Zoho Cliq Meetings. Current Limitation: in Zoho Cliq Only hosts and co-hosts can record a meeting. Participants cannot
    • Phone Connection

      When on a call the person on the other end complains that there is static, I am cutting in and out or they can't hear me all. This happens on the cell connection as well.
    • Can't add a sender adress from zoho campaigns

      hi, I need to change the sender address for a campaign.  When i try to add it i get a message to say 'duplicated email address found while adding your sender address'.  This is the first campaign i'm sending so I don't understand why this message is displayed? Thanks Jane 
    • Allow customers to choose meeting venue and meeting duration on booking page

      My business primarily involves one-to-one meetings with my clients. Given the hybrid-work world we now find ourselves in, these meetings can take several forms (which I think of as the meeting "venue"): In-person Zoom Phone call I currently handle these
    • This domain is not allowed to add. Please contact support-as@zohocorp.com for further details

      I am trying to setup the free version of Zoho Mail. When I tried to add my domain, theselfreunion.com I got the error message that is the subject of this Topic. I've read your other community forum topics, and this is NOT a free domain. So what is the
    • This user is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details

      Hello, Just signed up to ZOHO on a friend's recommendation. Got the TXT part (verified my domain), but whenever I try to add ANY user, I get the error: This user is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details I have emailed as well and writing here as well because when I searched, I saw many people faced the same issue and instead of email, they got a faster response here. My domain is: raisingreaderspk . com Hope this can be resolved.  Thank you
    • Export History timeline

      Hi, I have an idea, bout zoho desk history of the ticket it would be great if the agent or admin of the zoho desk can export the timeline of the ticket history for agent report or on other matter.
    • Desk fails to create a new ticket on Reply email

      When I send a direct email to support@mysite.com, Desk will create a new ticket as expected. When I REPLY to an email sent from support@mysite.com, Desk will NOT generate a new ticket. This is very bad. How can I fix this? Use case: In a separate system
    • Condition based aggregate fields in subforms

      Hello everyone, We're excited to inform you about the latest enhancements made to our aggregate field capabilities in subforms; create aggregate fields based on conditions! An aggregate field is a column on which a mathematical function has been applied.
    • Ask the Experts 25: Experience the full spectrum of Zoho Desk’s autumn and spring releases for 2025

      Hello Everyone, We’re on the 25th episode of our ATE series! It's a true milestone in our live community interactions! It’s been an amazing journey since we started in October 2018. Zoho Desk has come a long way, evolving with the support of a wonderful
    • Addin Support in Zoho Sheet

      Is there any addin support available in zoho sheet as like google marketplace to enhance productivity by connecting with other apps, providing AI data analysis, streamlining business processes, and more?
    • Zoho Books | Product updates | November 2025

      Hello users, We’ve rolled out new features and enhancements in Zoho Books. From translating email notification templates to the new transaction locking restrictions, explore the updates designed to enhance your bookkeeping experience. Making Tax Digital
    • Function #61: Automatically add free item to the invoice based on item quantity

      Hello everyone, and welcome back to another Custom Function Friday! During holiday seasons or special promotions, businesses offer deals like BOGO (Buy One, Get One), Buy 3 Get 1 Free, Buy 2 at 50% off, and much more to attract customers. These promotions
    • Notes for Items for Future Purchase Order

      Next time when I order an item, tau have to make some changes in it, that order has to be placed after 4-5 months, I want to save those changes or points somewhere in the item, how will that be possible..
    • Schemes of different tyoe

      How can easily apply hourly, day wise or month wise  schemes on Bill, Quantity, and other schemes. Like I want to apply a scheme  Form today to next 7 days .where i can mention in zoho books so scheme will implement automatically to all customers and
    • Zohomail

      Im trying to setup email address zoho
    • Clients not receiving emails

      I've been informed that my emails are not being received. Is there anything that I should look into to rectify this? Many thanks!
    • Free Plan mail accounts details

      In the zoho mail pricing there's a free plan that includes: FREE PLAN Up to 25 Users 5GB* /User, 25MB Attachment Limit Webmail access only. Single domain hosting. I need to make sure that I'm able to create multiple email accounts in the form of: name@domain.com
    • ZOHO Mail App Not working

      There seems to be an issue with Zoho Mail App today. It is not connecting to server, internet is working fine, tried uninstalling app and reinstalling, loading circle keeps spinning round. Is there an update on the way?
    • No more IMAP/POP/SMTP on free plans even on referrals with NO NOTICE

      Outraged. Just referred a colleague to use her domain (not posting it publicly here) to Zoho, just as I have other colleagues, clients, friends. Expected the exact same free plan features as I have and as everyone else I ever referred got. I was helping
    • Unable to receive email - "5.3.0 - Other mail system problem 554-'5.2.3 MailPolicy violation Error delivering to mailboxes'"

      My users are unable to receive emails from one particular domain, apparently. The domain known to be kicked back is whitelisted in the spam control. I sent an email to support earlier this morning but I have not received a reply. The error in the title
    • Caixa de saída bloqueada. Como desbloquear?

      Olá, meu e-mail isabela.celli@sivirino.com está com a caixa de saída bloqueada. Não consigo enviar e-mails. Acredito que tenha sido porque mandei o mesmo e-mail para várias pessoas, pedindo uma cotação de serviço. Vocês podem desbloquear para mim? Quantos
    • Zoho Forms - Improve the CRM integration field to query data from more than one module

      Hi Forms team, Something I get stuck on regularly is pre-populating a form with data when that data is spread across 2 or 3 modules. For example Contacts, Accounts and Deals. I don't want to duplicate the information in CRM so I end up writing a function
    • desbloquear cuenta

      Buenos dias  Cordial saludo Tengo una cuenta libre en zoho mail asociado a un dominio, pero uno de los usuarios se bloquea el correo porque dice que ha excedido el límite de correo, por favor podrian desbloquearla y como hago para que esta persona debe enviar sus correos sin ningun probleama. Gracias de antemano
    • Not Receiving Incoming Mail

      I can send emails from my account but I do not receive any. I originally set up forwarding and it worked for a while and then stopped. I turned off forwarding and now do not receive any emails. Could you please check what is causing this issue? Thank you
    • Will zoho thrive be integrated with Zoho Books?

      title
    • BARCODE PICKLIST

      Hello! Does anyone know how the Picklist module works? I tried scanning the barcode using the UPC and EAN codes I added to the item, but it doesn’t work. Which barcode format does this module use for scanning?
    • Making preview pane "stick"

      Hello, Is it possible to fix/dock the preview pane so that it's always there? The modern monitors are all very wide so there's plenty of space horizontally. Having the preview pane disappearing and appearing again when you click on an email message in
    • Reason:554 5.1.8 Email Outgoing Blocked

      I have been struggling to set up my email address for some time now; it's difficult to locate what I need. Additionally, I cannot send or receive any emails. I keep receiving the "Reason: 554 5.1.8 Email Outgoing Blocked" error. There doesn't seem to
    • Trouble Connecting Zoho Mail via IMAP in n8n – Need Help

      Hi everyone 👋, I'm trying to connect my Zoho Mail account to n8n using the IMAP Email Trigger node, but I'm facing issues getting it to work fully. ✅ Here's what I’ve done so far: ✅ IMAP access is enabled in my Zoho Mail settings ✅ I’m using the correct
    • Unable to send message; Reason:554 5.1.8 Email Outgoing Blocked

      Hi, I sent few emails and got this: Unable to send message; Reason:554 5.1.8 Email Outgoing Blocked And now I have few days since I cant send any email. Is there something wrong I did? Also can someone fix this please
    • Changes to the send mail Deluge task in Zoho CRM

      Hello everyone, At Zoho, we continuously enhance our security measures to ensure a safer experience for all users. As part of our ongoing security enhancements, we're making an important update on using the send mail Deluge task in Zoho CRM. What's changing?
    • Page Rules in Forms

      🚀 Dynamic Page Navigation Implementation I successfully implemented dynamic page navigation based on a user's radio button selection. The goal was to direct users to a specific, corresponding page while ensuring they only interact with the flow determined
    • Cancellation of written-off invoice

      Hi, Can I know when we cancel the write off (write back), in which FY, the reversal is recorded. It doesn't ask as to when the write off should be cancelled to reflect!. It shouldn't reflect in the year in which the invoice was written off since the Year
    • Create Invoice automated with Package

      Does anyone knows how to create an invoice from a SO when we have created the package? We do these manually. and validate that the product packed is the product invoiced (if the order is partially packed) Regards, JS
    • I want to create a mailing list, NOT a group.

      Can I create a mailing list in Zoho mail? I just want to be able to make a list of email addresses and give the list a name. Then when I type the list name, the list of email addresses will be automatically listed. When I create a group it sends an email
    • how to download all my files

      We are in the middle of zoho docs to zoho workdrive migration. I can not access my zoho docs page. I get redirected immediately to a zoho workdrive page. I would like to download all my files so that I have a backup in case something goes wrong with the
    • Export Invoices to XML file

      Namaste! ZOHO suite of Apps is awesome and we as Partner, would like to use and implement the app´s from the Financial suite like ZOHO Invoice, but, in Portugal, we can only use certified Invoice Software and for this reason, we need to develop/customize on top of ZOHO Invoice to create an XML file with specific information and after this, go to the government and certified the software. As soon as we have for example, ZOHO CRM integrated with ZOHO Invoice up and running, our business opportunities
    • no me llegan los correos a Zoho mail

      No puedo recibir correos pero sí enviarlos, ya hice la modificación de MX y la verificación de teléfonos, qué es lo que ocurre? gracias
    • Group Calendar as Default for adding new events, etc?

      Hi, I want to make the group calendar (that I created, if that makes a difference) the default for anything new I add to the calendar. How can I do that? thanks.
    • Next Page