Bottom line
A retainer agreement is executed, billing prerequisites are satisfied, and an account owner is assigned.
Best for
Executed agency retainers with assigned owners and a defined first deliverable.
Use when
Send within one business hour after the engagement record is activated.
Watch for
Unsigned scopes, unpaid prerequisites, or speculative pre-sales work.
How to Use This Email
When to use this
A retainer agreement is executed, billing prerequisites are satisfied, and an account owner is assigned.
What’s on their mind
The client may worry that onboarding will create security risk, unclear responsibilities, or delivery dates that ignore missing inputs.
What this email should do
A retainer agreement is executed and activated, and both parties need owners, secure access, dependencies, approvals, and first-deliverable timing.
Best sender
Strategist
Read the Finished Email
Review the message as a recipient would see it. The names and business details are fictional.
Subject
Start here: the current details onboardingHi Jordan,
Welcome to the the current details engagement with the current details. The signed scope begins October 14, and the first planned deliverable is the current details by October 14, subject to the dependencies below.
Please complete the secure checklist at https://example.com/next-step by October 14. It covers the current details. Do not send passwords, customer exports, API keys, or other sensitive access by email; use the current details.
Your agency owner is Alex Morgan. Please confirm Alex Morgan as the client-side approver, or reply with the correct person. The working cadence is the current details, approvals follow the current details, and urgent delivery issues use the current details.
If a dependency will be late or the scope summary at https://example.com/next-step is wrong, reply now so we can revise the delivery plan rather than silently miss a date.
Alex Morgan
the current details
(555) 014-0182
Template to copy
Subject
Start here: [Engagement name] onboardingHi [First name],
Welcome to the [Engagement name] engagement with [Agency name]. The signed scope begins [Contract start date], and the first planned deliverable is [First deliverable] by [Target date], subject to the dependencies below.
Please complete the secure checklist at [Onboarding link] by [Client due date]. It covers [Required inputs]. Do not send passwords, customer exports, API keys, or other sensitive access by email; use [Secure access method].
Your agency owner is [Account owner]. Please confirm [Client owner] as the client-side approver, or reply with the correct person. The working cadence is [Meeting cadence], approvals follow [Approval process], and urgent delivery issues use [Escalation path].
If a dependency will be late or the scope summary at [Scope link] is wrong, reply now so we can revise the delivery plan rather than silently miss a date.
[Account owner]
[Agency name]
[Phone number]
Subject Line Variations
- Start here: [Engagement name] onboarding
Clarity-first control tied to the exact business event.
- [Engagement name] owners and onboarding checklist
Alternative emphasizing the decision context.
- Your first steps with [Agency name]
Alternative for a recipient already familiar with the engagement.
Best for
- Executed agency retainers with assigned owners and a defined first deliverable.
- Engagements using secure, least-privilege access workflows.
Don’t send this if
- Unsigned scopes, unpaid prerequisites, or speculative pre-sales work.
- Projects without an authorized client approver or secure access method.
When to Send It
Trigger
A retainer agreement is executed, billing prerequisites are satisfied, and an account owner is assigned.
Timing
Send within one business hour after the engagement record is activated.
Frequency
Send once per new engagement or formally approved restart.
Make This Email Yours
- Populate deliverables and dates from the executed scope.
- Use a secure delegated-access process rather than shared credentials.
- Name both agency and client-side decision owners.
Before You Use This Email
Why This Approach Works
Platform Setup Steps
Trigger
A retainer agreement is executed, billing prerequisites are satisfied, and an account owner is assigned.
Segment
Newly activated retainer engagements with executed scope, satisfied billing prerequisites, and assigned delivery ownership.
Delay
Within one business hour of engagement activation.
Reply owner: Assigned account owner accountable for onboarding completeness, secure access, scope clarification, and delivery handoff.
- Verify executed scope, activation, billing prerequisite, owners, and target dates.
- Create a least-privilege secure-access checklist and map every dependency to an owner.
- Send once, track checklist completion, and escalate missing or disputed inputs before delivery work begins.
Stop conditions
- Stop on contract reversal, billing hold, duplicate engagement, security hold, or invalid recipient authorization.
- Stop reminders when all required inputs are complete or an owner opens a manual exception.
- Recalculate target dates when a documented dependency changes.
Mistakes To Avoid
- Asking the client to email account passwords
It creates an avoidable security and offboarding risk.
Use instead: Use delegated access or the approved secure credential process.
- Starting with a vague welcome and no owners
Dependencies become invisible and deadlines drift.
Use instead: Name owners, due dates, approval mechanics, and escalation.
Sequence Placement
Use once at client onboarding after commercial activation. Checklist completion enters delivery; scope, security, or billing exceptions pause the engagement and move to a named human owner.
Related Email Platform Guidance
teams running behavior-based nurture with branching, scoring, and segmentation
Not best for: teams whose requirements stop at newsletters and a short welcome series
View ActiveCampaignPaid linkagencies standardizing lead-response systems across multiple accounts
Not best for: teams expecting a native field-service or legal practice-management system
View GoHighLevelPaid linkB2B organizations aligning marketing, sales, and service around shared CRM data
Not best for: small teams needing only broadcasts and a simple welcome sequence
View HubSpot
Disclosure
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