--- schema_version: "1" id: 6a673ced3bee37f6585fac310fd0c7effd512ddcd87d64569faebe96e228945f title: Considerations for Sync Email as Salesforce Activity collection: admin version: current locale: en-us portal_url: https://docs.salesforce.com/admin/current/en-us/sales/264-0-0/eac_email_activity_considerations.md canonical_url: https://help.salesforce.com/s/articleView?id=sales.eac_email_activity_considerations.htm&release=264.0.0&type=5 source_site: help.salesforce.com content_type: documentation content_hash: b723513bcc0ff5a7a39c3355abb17712de806dcecebda43a7e266d2d8f263958 description: "Keep these limits and considerations in mind when Sync Email as Salesforce Activity is enabled in Einstein Activity Capture and using Activities: Match Email to Records flow to match captured email data to existing records." products: - Sales Cloud - Cross Cloud - Service Cloud Voice release: "264" --- # Considerations for Sync Email as Salesforce Activity Keep these limits and considerations in mind when Sync Email as Salesforce Activity is enabled in Einstein Activity Capture and using Activities: Match Email to Records flow to match captured email data to existing records. ### Required Editions
Available in: Lightning Experience
Available with Einstein Activity Capture Standard in Sales in Starter, Pro Suite, Professional, and Enterprise Editions
Available with Unlimited Edition, Einstein 1 Sales Edition, and Agentforce 1 Edition
Available with Einstein for Sales, which is included in Einstein 1 Sales Edition and available for an extra cost in Enterprise and Unlimited Editions
Available with Sales Engagement, which is included with Sales in Performance and Unlimited Editions, and available for an extra cost in Professional and Enterprise Editions
Available with Revenue Intelligence, which is available for an extra cost in Enterprise and Unlimited Editions
![Note](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-sales-sales_productivity-264-0-0-production-enus/b2f6c36a-fa61-4a3c-9752-032ce1818a69/images/icon_note.png) Note We’re reorganizing the Einstein Activity Capture documentation. We’re moving some information around, but we aren’t deleting anything. ## Considerations for Email Sync - Salesforce can associate up to 50 unique email addresses from the From, To, and Cc fields of an email message with your contact records. Additional email addresses are ignored. - Enhanced Email is enabled automatically and is a requirement for Sync Email as Salesforce Activity. - When Sync Email as Salesforce Activity is enabled, you can manually log emails in addition to the emails that are automatically synced. If you also use the Log Email button in the integration side panel in Outlook or Gmail, the same email can be logged twice, resulting in duplicate activity records on the timeline. - With the synced email and tasks stored in Salesforce, they’re subject to your org’s data storage limits. To minimize data storage costs, we recommend regularly archiving email data to long-term storage, such as Salesforce Archive. - Data associated with excluded email addresses and domains, including internal addresses, isn’t captured or stored in Salesforce by Einstein Activity Capture. - Excluded Address settings don’t apply to messages sent from Salesforce Composer or other email messaging components. - Each user can sync up to 50,000 historic emails from the past 180 days. The sync stops when the time limit or email count is reached. Newer emails sync faster than older emails. - When you set up Einstein Activity Capture with Sync Email as Salesforce Activity, email insights for initial use are generated only for the past 30 days of email. If you migrate Einstein Activity Capture to Sync Email as Salesforce Activity, email insights are generated for the past 90 days of email. - An org can sync up to 250,000 emails per hour for optimal performance. Syncing more emails than that affects performance. - When Salesforce associates a synced email with a record, only the standard email field is considered. Custom email fields aren’t supported by default. To match emails using custom email fields, customize the Activities: Match Email to Records flow. See [How Email Activity Matches with Other Records](https://help.salesforce.com/s/articleView?id=sales.eac_email_activity_flow.htm&release=264.0.0&type=5 "Einstein Activity Capture tries to associate each address in the From, To, and CC on an email to user, contact, or lead records. The addresses and related activity are also matched with account and opportunity records. The default matching logic considers record ownership, recent activity, and other factors to connect new addresses and activity to your existing data."). - If a record’s email field is updated, emails previously associated with the record remain associated. - Email attachments aren’t synced or stored in Salesforce. To view or download an attachment, open the message in the inbox of your connected account. - Emails sent to a distribution list or group are captured if a member of that list is an Einstein Activity Capture user and the To or CC fields include an external address with a matching Salesforce record. - Contact record associations are stored as EmailMessage relations and Task relations. We recommend that you turn on the **Shared Activities** setting. This allows you to capture multiple contacts for each email. Activity sharing rules determine who can view, edit, or delete the email activity. Task ownership and role hierarchy are honored by the activity sharing rules configured for your organization. - If an email doesn't match any CRM records, it won't be created as a Task or EmailMessage record. If you create a contact or lead record for that new email address, new emails to or from that address are synced and matched. - You can customize the contact record matching rules to fit your business needs. For example, you can use partner co-selling, custom matching logic, relate emails to custom objects, or block specific emails. - Complex matching rules can slow queries. These rules can also impact email sync timelines. We recommend testing the logic in a sandbox. Check its performance before using it in your Salesforce production org. - When you sync emails, there are size limits for the email body. When the email is stored in the Task object, the limit is 32,000 characters of plain text. When the email is stored in the EmailMessage object, the limit is 131,072 characters of plain text or rich text. - If a user manually associates an email message with a CRM record, then Sync Email as Salesforce Activity doesn’t overwrite that association. For example, a user associates a synced email with a contact, which then shows the contact in the Related To section of the email record. Sync Email as Salesforce Activity won’t overwrite that association. - Users can edit automatically matched CRM record associations to improve CRM context and power sales analytics. - You can update associations for synced emails in the thread to which you have edit access. - If you change the email address of a record, retro-active matching isn't performed on previously synced emails. Emails synced in future are matched against the new email address of the record. - You can delete an email you own or have access to from the Activity Timeline and Email Message home page. However, deleting the complete email thread isn’t supported. - An EmailMessage record can’t match to a private contact (which is a contact without an AccountId) unless the user who owns the private contact also matches to the EmailMessage. - An EmailMessage can match to a contact or lead record even if the syncing user doesn’t have access to the contact or lead. - When using third-party plug-ins like CodeTwo and Mimecast, standard email headers can get modified and cause email threading in the Activity Timeline not to work as expected. If this occurs, uninstall or disable the plug-in. ## Unavailable Features When Sync Email as Salesforce Activity is on, these features are unavailable. - Email Insights aren’t available for header only emails. - Activity Metrics and Activity Metrics Summary in Account Intelligence, Contact Intelligence, and Lead Intelligence views - Einstein Activity Capture Sharing Settings - Activity Timeline Metric Summary, Users Involved in Deals, and External Contacts sections in Pipeline Inspection - [Recommended Connections](https://help.salesforce.com/s/articleView?id=sales.einstein_sales_setup_recommended_connections.htm&release=264.0.0&type=5 "Give sales reps access to the Recommended Connections component so they can see which colleagues have the strongest connections to a prospect. Reps can then get in touch with colleagues who can help get conversations going with prospects.") - [Activity 360 Reporting](https://help.salesforce.com/s/articleView?id=sales.einstein_sales_activity_reporting_overview.htm&release=264.0.0&type=5 "Use standard reports to keep an eye on all your activities and customer interactions. Turn on Activity 360 Reporting to enable reporting objects that unify your automatically captured data from Einstein Activity Capture with all your other activity data, such as calls, manually logged tasks, and emails. View the out-of-the-box dashboard and reports to easily monitor your team’s activity. Trigger flows from Activity 360 Reporting data to automate your business processes."), [Activities Analytics Dashboard](https://help.salesforce.com/s/articleView?id=sales.aac_dashboard_parent.htm&release=264.0.0&type=5 "The Activities analytics dashboard provides a summary of sales activities, including activities added manually and with Einstein Activity Capture."), [Activity Metrics](https://help.salesforce.com/s/articleView?id=sales.aac_activity_metrics.htm&release=264.0.0&type=5 "If you use Einstein Activity Capture, Activity Metrics gives you all the information you need about your activity data. When you include Activity Metrics fields on list views, page layouts, reports, triggers, processes, and so forth, the data reflects activities that were added to Salesforce manually and by Einstein Activity Capture."), and dependent features Header only email capture in isn’t compatible with Agentforce Lead Nurturing and other Einstein generative AI features. If you turn on Agentforce Lead Nurturing before you set up Sync Email as Salesforce Activity, you can’t use header only email capture. If you set up Einstein Activity Capture with Sync Email as Activity to capture header only email and then turn on Lead Nurturing, agent analysis and responses don’t include email message bodies. This reduces the quality of the agent-generated email outreach. To report on activity data, use standard [activity reports](https://help.salesforce.com/s/articleView?id=analytics.reports_activity.htm&type=5&language=en_US). Use the [last activity date](https://help.salesforce.com/s/articleView?id=sales.activities_view.htm&release=264.0.0&type=5 "Review guidelines for tracking tasks and events, including how activity access is determined, how record-activity relationships work, and how the last activity date on a record is determined.") metric or other standard reporting metrics. With Sync Email as Salesforce Activity, standard activity reports automatically include captured email data. #### See Also - [_Knowledge Article:_ Einstein Activity Capture Activity 360 Reporting, Activity Metrics, Activities Dashboard Upcoming Retirement (Summer ‘26)](https://help.salesforce.com/s/articleView?id=004633781&type=1&language=en_US)