Select naturally—or load every unread thread.
Use Gmail’s checkboxes for a precise batch. Unlimited plans can also load every unread inbox conversation, up to the 500-conversation run limit, without selecting page after page.
Mass email forwarding for Gmail
Mass forward emails in Gmail.
Keep every send under control.
ThreadRelay is a Chrome and Safari extension that forwards many selected Gmail threads to one or more recipients. Review every recipient and the exact count, then run a paced queue with account checks and private local history.
Chrome and Safari listings are preparing for release.
See the productAccount-matchedQuota-awarePrivate by design
ThreadRelay
PRO5threads ready
to relay
to relay
✓
Nothing sends until you confirm.
Install ThreadRelay
Your inbox.
Your browser.
Install the free extension for Chrome or Safari, then sign in once to carry your plan between the website and extension.
Coming soonChrome Web Store↗
Coming soonMac App Store↗
Chrome and Safari listings are preparing for release.
A calmer way through the backlog
The forwarding workflow
Gmail should have shipped.
Review once.
See the source account, every recipient, and the exact thread count before anything leaves your inbox.
Let the queue run.
ThreadRelay spaces Gmail API calls, retries safe operations, and lets you pause or resume without starting over.
Know exactly what moves
The latest message body from each selected thread.
ThreadRelay creates a separate forward for every selected Gmail conversation. It currently includes the latest message’s text and HTML body; attachments and inline images are not yet carried over.
See the complete forwarding guidePrivate by design
Your messages don’t detour through our server.
ThreadRelay processes selected messages in your browser and sends them from the Gmail account you connect. Your email bodies are never stored by ThreadRelay.
Read the privacy policyBuilt for real inbox work
Mass email forwarding without losing control.
ThreadRelay is for moving existing Gmail conversations—not newsletters, marketing campaigns, or cold email.
Forward old Gmail emails
Search for an older project, client, or date range in Gmail, select the conversations you need, and move the batch through one reviewed queue.
Transfer project correspondence
Hand off selected client, vendor, or project conversations to a confirmed recipient list while keeping a local record of the run.
Process support and records
Forward selected support tickets or record requests with pacing, progress, and separate reporting for delivery and follow-up actions.
Questions, answered
Mass forward multiple emails in Gmail.
What does “mass email forwarding” mean?
It means forwarding many existing Gmail conversations to one or more reviewed recipients in a controlled batch. ThreadRelay is not an email-marketing, newsletter, or cold-email sending service.
How do I forward multiple emails in Gmail at once?
Install ThreadRelay, select conversations using Gmail’s checkboxes, open the extension, review every recipient and the message count, then start the forwarding queue. Nothing sends until you confirm.
Can I bulk forward old Gmail emails?
Yes. Use Gmail search to find the older conversations you need, select the results, and send those selections through ThreadRelay’s controlled queue.
How is this different from Gmail’s native forwarding?
Gmail supports forwarding an individual message or forwarding selected messages as attachments. ThreadRelay adds a paced queue, account checks, pause and resume controls, optional Gmail follow-up actions, and local run history.
How many Gmail accounts and conversations can I use?
Free supports 1 connected Gmail account and 20 conversations per UTC day. Unlimited Monthly, Unlimited Annual, and the Seven-Day Unlimited Pass support up to 5 connected Gmail accounts with no ThreadRelay daily cap. Unlimited customers can choose Unread Inbox to load every unread conversation, up to the 500-conversation run limit. Gmail may apply its own sending quotas.
Are attachments and inline images forwarded?
Not yet. Each ThreadRelay forward includes the latest message’s text and HTML body. Attachments and inline images are not currently carried over.
Does ThreadRelay store my email content?
No. Selected message content is processed in the extension and sent from the Gmail account you connect. ThreadRelay does not store email bodies.
Simple pricing
Start free.
Upgrade when volume matters.
No setup fee. Upgrade, change, or cancel your plan from your account.
Free
$0forever
For occasional forwarding.
- Gmail accounts1
- Conversations per UTC day20
- Unread inbox sourceUp to daily allowance
- Conversations per runUp to 500
- Queue, pause, and resume✓ Included
- Labels and archive actions✓ Included
- Team admin controls—
Most popular
Unlimited Monthly
$7.99per month
First month 50% off.
- Gmail accountsUp to 5
- Conversations per UTC dayUnlimited*
- Unread inbox sourceEvery unread thread
- Conversations per runUp to 500
- Queue, pause, and resume✓ Included
- Labels and archive actions✓ Included
- Team admin controls—
Unlimited Annual
$67.12per year · save 30%
The same unlimited plan, billed yearly.
- Gmail accountsUp to 5
- Conversations per UTC dayUnlimited*
- Unread inbox sourceEvery unread thread
- Conversations per runUp to 500
- Queue, pause, and resume✓ Included
- Labels and archive actions✓ Included
- Team admin controls—
Seven-Day Unlimited Pass
$29one time
Unlimited daily use for seven days.
- Gmail accountsUp to 5
- Conversations per UTC dayUnlimited* for 7 days
- Unread inbox sourceEvery unread thread
- Conversations per runUp to 500
- Queue, pause, and resume✓ Included
- Labels and archive actions✓ Included
- Recurring charge— None
Teams
Coming soonshared workspace
For managed company use.
- Gmail accountsPlanned: up to 20
- Conversations per UTC dayPlanned: unlimited*
- Conversations per runPlanned: up to 500
- Shared team accessPlanned
- Admin controlsPlanned
- Approved destinationsPlanned
*Unlimited means no ThreadRelay daily cap. Gmail quotas and the 500-conversation per-run safety limit still apply. Secure checkout opens separately.