Context

When you add contacts to an email sequence, emails are scheduled based on the sequence's pre-defined timing. Sometimes, you may want to override this scheduling to send a specific contact's next scheduled email immediately, effectively moving them to the top of the queue.

When contacts are enrolled outside of the configured sending hours, their emails are queued for the next available sending window, even if the sequence has no initial delay. This means that enrolling a contact at 5 PM in a sequence with “0 days” delay will still result in the email being scheduled for the next business day during sending hours, rather than sending immediately.

Answer

Currently, it is not possible to directly move a single contact to the top of the queue within an existing sequence. These are two workarounds:

Option 1: Sequence Pausing Method

1. Pause all other active sequences

2. Wait for the desired contact's email to send

3. Unpause the other sequences to resume normal operation

Important: Make sure to check that sequences are actually running before pausing them, because when a sequence is paused, no emails will be sent, including any previously queued emails. You can verify a sequence's status by looking for the toggle switch at the top right of the sequence page — it should be "on" for active sequences.

What happens when paused: Contacts remain enrolled in the sequence and are not unenrolled. When you unpause the sequence, previously queued emails are automatically rescheduled to the next available time within your sending schedule.

Option 2: Duplicate Sequence Method

1. Unenroll the contact from the current sequence

2. Create a duplicate of the original sequence

3. Pause the original sequence

4. Add the contact to the new duplicate sequence

5. Wait for the email to send

6. Unpause the original sequence

7. Optional: If you want to prevent new contacts from enrolling while the sequence is paused, pause the associated Play(s) as well. Resume the Play(s) when you're ready to accept new enrollments again.

Important: Verify that the original sequence toggle is "on" when you unpause it to ensure emails resume sending properly.

Primary Solutions for Email Sequence Backlog Management

While the existing workarounds can help with individual contacts, these primary solutions address the root cause of email sequence backlogs more effectively:

Understanding Email Backlog Behavior

Email backlogs can appear stagnant for several days due to Unify's built‑in scheduling limitations:

• Each mailbox has a default limit of 25 sends per day

• Emails are only sent on business days, excluding US holidays

• Emails are sent only during set sending hours (default: 9 AM - 4 PM PT)

The “total emails in backlog” metric includes blocked emails, which can make the backlog appear larger than it actually is. Blocked emails don’t affect new enrollments or your sending capacity, and they can mislead you about your true backlog status. Focus on queued (non‑blocked) emails for accurate capacity planning.

For example, if 500 emails are queued for one mailbox, it could take 7 business days to send them all at the default rate. Additional emails queued during this period will be scheduled after the existing backlog clears. Understanding these limitations helps determine whether your backlog requires intervention or is simply processing normally.

Understanding Blocked Emails in Backlog Metrics

Blocked emails are a common cause of inflated backlog numbers. They do not impact sending capacity, but they can distort the metric.

• Individual refresh: Right‑click the enrollment and select “Refresh” to update template variables.

• Bulk refresh: Use the bulk refresh feature to update multiple enrollments at once.

• Prevention: Review template variables before sending to ensure all contacts have the required data fields.

Increase Sending Capacity

Distribute Emails Across Multiple Mailboxes

• Add more mailboxes to your account to increase daily sending capacity

• Example: One mailbox sends 25 emails/day, while five mailboxes handle 125 emails/day

• This reduces overall backlog and speeds up delivery for all sequences

Strategic Sequence Management

Pause Lower-Priority Sequences

• Navigate to the sequences page and toggle lower-priority sequences to "Paused"

• This allows the system to recalculate send times and prioritize critical sequences

• Resume paused sequences once priority emails have been sent

• Paused sequences retain all enrolled contacts; queued emails will automatically reschedule when you resume the sequence

Dedicate Mailbox Groups

• In Play Builder, open the Sequence action for your campaign and click Edit routing

• Add only the specific mailboxes you want dedicated to this sequence

• Contacts enrolled in a sequence will automatically round‑robin through the mailboxes you’ve selected for that sequence

• Remove those mailboxes from routing in other sequences to make them exclusive to this campaign

• Assign specific mailbox groups to different campaign types (e.g., warm vs. cold outreach)

• Ensure critical sequences like MQL sequences are assigned to dedicated mailboxes

• This prevents lower‑priority campaigns from creating backlogs for important sequences

When configuring mailbox routing, click the Edit persona routing button (not “Edit routing”) and do so through Play Builder, as routing cannot be changed directly in the sequence interface.

After any routing modification, you must republish the play for the changes to take effect; otherwise, new enrollments will continue to use the previous routing settings.

Tip: Finalize mailbox assignments before queuing any manual emails to avoid re‑enrollment of steps.

Reassign to Lower-Backlog Inboxes

Move Enrollments to Available Capacity

• Navigate to the email backlog page to view current backlog numbers for each inbox

• Important: The email backlog page can only bulk reassign Step 1/queued emails. Mid-sequence scheduled emails cannot be bulk reassigned and must be updated manually for each enrollment.

• Reassign enrollments from high‑backlog inboxes to those with lower backlog numbers

• This provides immediate relief when emails aren't sending as scheduled due to capacity constraints

• Check queued emails by clicking into them to see actual scheduled send dates and identify backlog delays

Bulk Reassign Tasks

Understanding Task vs. Mailbox Ownership

Task ownership and mailbox ownership are independent. Reassigning task owners does not change which mailbox sends the emails - emails will continue to send from the current mailbox owner while reassigned tasks appear under the new owner's task list.

Why "Assign to" May Be Grayed Out

If you see a grayed out "Assign to" button with the message "manual email tasks created by plays will be automatically assigned to the enrollment mailbox owner," this is because task assignment for sequence-generated tasks is controlled at the sequence level, not per individual step. Use one of the methods below to reassign tasks.

Method 1: Reassign Existing Tasks

• Navigate to the Tasks tab in your dashboard

• Filter by task type (e.g., Call) and optionally by sequence to narrow results

• Select all tasks you want to reassign

• Choose "Assign Owner" to bulk reassign the selected tasks to a different owner

• This is useful when you've changed sequence routing and need to update task assignments to match, or when you need to reassign specific contacts' tasks

Method 2: Configure Task Assignment for New Enrollments

• Open the sequence and click Edit

• Go to Advanced Settings

• Enable "Manually assign tasks" and select the desired task owner

• Save the sequence

• Note: This assigns all new sequence-generated tasks (including call tasks) to the selected owner, while emails still send from the existing mailbox owner. This only affects new enrollments; existing enrollments keep their current task assignment.

Manual One-Off Emails for Urgent Sending Needs

Manual one-off emails sent directly from contact records bypass the 25‑emails‑per‑mailbox‑per‑day automated limit, providing an immediate option for urgent communications.

• They are not subject to the 25‑emails‑per‑mailbox limit, so you can send urgent messages instantly.

• Use this when you need to send emails immediately (e.g., event invitations) and cannot wait for the automated sequence backlog to clear.

• To send them, open individual contact records and compose emails directly from there.

• These emails send immediately and can supplement your automated sequence sends.

• Be mindful of overall deliverability when sending large volumes of manual emails.