Connect SMTP/IMAP email accounts

Email sync for SMTP/IMAP is available on the Business and Max plans. Upgrade here.

Keep all communication organized in one place. Connect your email account via SMTP/IMAP to OnePageCRM's Email sync and manage messages with contacts directly in the CRM.

SMTP vs. IMAP

SMTP (Simple Mail Transfer Protocol) - Send emails from your email client to the recipient’s server. It handles outgoing messages but does not manage your inbox.

IMAP (Internet Message Access Protocol) - Receives and manages emails. It keeps everything synced across all your devices.

Together, SMTP and IMAP allow you to send, receive, and manage your emails in applications like OnePageCRM.

Before you start

You'll need four things from your email provider:

Incoming (IMAP) server address — e.g., imap.example.com
IMAP port — usually 993
Outgoing (SMTP) server address — e.g., smtp.example.com
SMTP port — usually 587 or 465

Your username is usually your full email address, and your password is your email password. If that doesn’t work, check the App passwords section below.

Find your provider's settings in the table below. If it's not listed, check your provider's help documentation or contact their support.

Connect your SMTP/IMAP email account

Jump up to Article's Overview ⮝

Go to Email.

Apps and Integrations | Communication Apps | Email

Under Configuration → click Connect.

Email sync | Configuration settings page | Connect button at the bottom

Select SMTP/IMAP Connection from the provided options → Next.

Choose your connection type → click on Connect.

Email sync | Choose your connection type

Under User Identity, add email address you want to connect → click on Next.

Under Outgoing SMTP Server, add the details provided by your email client → click on Connect.

💡 Port must be one of: 25, 465, 587, 2525

💡 If you selected the Send and Save manually option, the connection is now complete.

💡 Should you encounter an error message when trying to connect, please contact Support.

💡 Some SMTP providers do not save emails sent from the CRM to their Sent folder.

Under Incoming IMAP Server, add the details → click on Connect.

💡 Port must be one of: 143, 993

💡 Should you encounter an error message when trying to connect, please contact Support.

Select the folders to sync → click on Save & Close.

Once connected, you can adjust which folders are synced from your email account by selecting the Gear icon.

Email sync | IMAP/SMTP connected | Reconfigure the synced folders by selecting the Gear icon

Email provider settings

Use this table to find the server details for your provider.

Provider	IMAP server	IMAP port	SMTP server	SMTP port	Notes
Gmail	`imap.gmail.com`	993	`smtp.gmail.com`	587	Must enable IMAP in Gmail settings first. Requires an app password if 2-Step Verification is on.
Outlook / Hotmail / Live	`outlook.office365.com`	993	`smtp-mail.outlook.com`	587	Must enable IMAP in Outlook settings first.
Yahoo Mail	`imap.mail.yahoo.com`	993	`smtp.mail.yahoo.com`	465 or 587	Requires an app password — your regular Yahoo password won't work.
iCloud Mail	`imap.mail.me.com`	993	`smtp.mail.me.com`	587	Username is your iCloud address (e.g., `name@icloud.com` ). Requires an app password.
Zoho Mail (free)	`imap.zoho.com`	993	`smtp.zoho.com`	465 or 587	Use your Zoho account password. If 2FA is on, use an app password.
Zoho Mail (paid / custom domain)	`imappro.zoho.com`	993	`smtppro.zoho.com`	465 or 587	Use your full email address as the username.
Fastmail	`imap.fastmail.com`	993	`smtp.fastmail.com`	465	Requires an app password — your regular Fastmail password won't work. Do not enable Secure Password Authentication (SPA).
IONOS	`imap.ionos.com`	993	`smtp.ionos.com`	465 or 587	Use SSL/TLS on port 465, or STARTTLS on port 587. Requires TLS 1.2 or higher.
Register365	`imap.reg365.net`	993	`smtp.reg365.net`	465	Authenticated SMTP must be active on your mailbox. Enable it in your Register365 control panel before connecting.

💡 All providers use SSL/TLS encryption.

💡 Use your full email address as your username unless otherwise noted.

If your provider isn't listed in this table, check your provider's help center for "IMAP settings" or "email client setup."

You're looking for:

An incoming mail server (IMAP) address and port
An outgoing mail server (SMTP) address and port

💡 Most providers list these in a support article. If not, contact their support.

App passwords

Some providers block third-party apps from using your main account password as a security measure. If that's the case, you'll need to generate an app password. This is a separate password created specifically for OnePageCRM.

This applies to: Gmail (with 2-Step Verification), Yahoo Mail, iCloud Mail, and Fastmail.

How to generate one:

Gmail: Google account security → 2-Step Verification → App passwords
Yahoo: Yahoo Account security → Manage app passwords
iCloud: appleid.apple.com → Sign-In and Security → App-Specific Passwords
Fastmail: Fastmail Settings → Privacy & Security → App passwords

💡 Use the generated password when connecting your account in OnePageCRM.

Troubleshooting

If you see an error when connecting:

Double-check the server address and port against the table above
Make sure IMAP is enabled in your email account (Gmail and Outlook)
Confirm you're using an app password if your provider requires one
See the Email sync errors article for specific error messages