How to Fix SMTP Errors during Office 365/Outlook/Gmail integration
Introduction
When trying to integrate your Office 365/Outlook email with your Zoho CRM you may receive a STMP error (refer to screenshot for error message example). If you have any questions about this extension, please reach out to support@bluroot.ca
Microsoft/Outlook
Microsoft/Outlook
This error message can be resolved by following the steps below:
- Select the user whose email ID is used to integrate with Zoho CRM, click Mail in the side pane that pops out.
- Click Manage Email Apps in the Email apps section.
- Select Authenticated SMTP setting if it is not already selected. If the option is already selected, unselect and select again.
- Click Save Changes.
Video for reference: https://www.youtube.com/watch?v=3Ncy2cJhcdo
If this issue continues to persist, it is most likely because the client is using a 3rd party hosting for Office365/Outlook and we will need to get the following details from their server in order to integrate their email using the "Other Mail" option.
For IMAP Integration:
For POP Integration :
Gmail SMTP
Step 1: Enable IMAP in Gmail
- Go to Gmail → Settings (⚙️) → See all settings
- Open the “Forwarding and POP/IMAP” tab
- Enable IMAP
- Click Save Changes
Step 2: Enable 2-Step Verification
Visit:
- Turn on 2-Step Verification
Step 3: Generate an App Password
- Select:
- App: Mail
- Device: Other (Zoho CRM)
- Generate the password
- Copy it (this will be used instead of your Gmail password)
Step 4: Configure SMTP in Zoho CRM
Use the following settings:
Incoming Server:
Incoming Server:
- Username: Your full email address
- Password: App Password (not your Gmail password)
- IMAP Server: imap.gmail.com
- Port: 993
- Requires SSL: Yes
Outgoing Server:
- Username: Your full email address
- SMTP Server: smtp.gmail.com
- Port: 587
- Encryption: TLS
Step 5 (If applicable): Check with Google Admin
If you're using Google Workspace, ask your admin to ensure:
- Gmail is enabled for your account
- External app access is allowed