TL;DR: Remove the custom message from the LinkedIn connection request step in your campaign, then let the campaign resume with a standard invite. Verify the warning is gone and leads start progressing past the blocked LinkedIn invite step.
Symptoms
You see a warning that says linkedin invites are blocked.
The warning says the invites will be unblocked later and shows a delay such as It'll be unblocked in X hours.
Your campaign stops progressing on a LinkedIn connection request step.
A LinkedIn invite step with a custom note does not send.
Leads stay stuck instead of moving to the next step in the sequence.
Environment
Applies to LinkedIn campaign steps in lemlist.
Applies when the LinkedIn connection request step includes a custom invitation message.
Applies to senders who have reached LinkedIn's custom invitation limit.
Step-by-Step Fix
Open lemlist and go to Campaigns. Check whether the campaign shows a LinkedIn invite warning in the campaign list.
Open the affected campaign.
Find the LinkedIn connection request step that contains a custom invitation note.
Remove the custom message from the LinkedIn invitation step.
Save the campaign changes.
Wait for the campaign to resume automatically with a standard LinkedIn connection request.
✅ Verify: the blocked custom invite warning no longer prevents progression, and new leads move past the LinkedIn invite step.
Success looks like this: the campaign continues sending standard LinkedIn connection requests instead of stopping on the custom invitation step.
Confirm It's Fixed
✓ The campaign is no longer stuck on the LinkedIn invite step.
✓ Leads continue progressing through the sequence.
✓ The custom invitation is no longer required for the step to send.
✓ Standard LinkedIn connection requests are sent after the change.
Why It Happens
LinkedIn limits how many connection requests with a custom note each account can send per month. As of 2025, this limit is 3 custom invitations per month (previously 5). Once that quota is reached, LinkedIn blocks additional custom invitation notes until the next monthly reset. If the campaign step depends on a custom note, lemlist cannot send that step until the limit resets or the custom note is removed.
Alternatives
Wait until LinkedIn resets your custom invitation quota (monthly reset), then keep the custom note in the campaign.
Use custom invitations only for your top 3 highest-priority prospects per month to avoid hitting the limit again.
Escalate If Unresolved
Share the campaign ID, the exact warning text, and the timestamp when the block appeared.
Share whether the LinkedIn step still contains a custom message and whether leads remain stuck after saving the campaign.