ESP Matching improves deliverability by automatically sending emails from accounts that match the recipient's email provider, Google to Google, Outlook to Outlook, and so on. Watch a full video explanation HERE.
If none of your sending accounts match a lead's provider, the campaign proceeds as normal using whatever accounts are available.
How It Works
Matching provider available: If a lead uses Outlook and you have at least one Outlook sending account, the system waits to send from the matched account.
No matching provider: If a lead uses Outlook but you only have Gmail accounts, the system proceeds with Gmail without waiting.
Impact on Sending Volume
ESP Matching may reduce your sending volume, as the campaign will wait for a matched account to become available before sending. To minimize this impact, add sending accounts from multiple email providers so the system has more matching options.
Enable ESP matching at the campaign level
You can enable Email Service Provider Matching in the campaign by following these steps:
Open the target campaign
Go to the Campaign Options tab.
Select Advanced Options -> Provider Matching.
You can create custom ESP routing rules to select which ESP sends or does not send emails to which recipient ESPs.
Enable ESP matching at the workspace level
You can also enable Email Service Provider (ESP) Matching for all campaigns in the workspace by following the steps below:
Go to the Advanced Deliverability setting
Enable ESP Matching
This setting will match your email-sending ESP (email service provider) to the specific ESP of your recipients across all campaigns, to increase the likelihood of emails landing in the Inbox.
Frequently Asked Questions
What happens if none of my accounts match a lead's provider
What happens if none of my accounts match a lead's provider
The campaign sends as normal using your available accounts if there are no matching accounts.
What if only one account matches the majority of my leads
What if only one account matches the majority of my leads
The campaign will wait for that one account to become available for all matched leads, which can slow sending. For example, if one Gmail account matches 80% of your leads, that account handles all matched sends, while the remaining 20% are sent from any available account as usual.
Will ESP Matching affect my daily sending limits
Will ESP Matching affect my daily sending limits
It can. If the campaign is waiting for a matched account to become available, it may not reach your full daily limit. Adding more sending accounts from different providers helps reduce this impact.

