Hello
Please check the recipient's email account, sometimes if it has some inappropriate character this happens

Hey Drew, one thing you can do is go into the Process Modeler and put the correct email address into the 'Send to' field for the email activity, and then retry the step.  If it is a variable listed, just put the direct email address in there temporarily so you can continue the process, you can always go back and figure out what went wrong with the variable later.  After changing the email address, go to the 'Processes' tab, find the process, go to the 'View Metrics' dropdown on that line, choose 'instances', and then click the instance that is hung up.  When you do that, and all the tasks show up, click the colon near the end of the line the task is on that is suspended.  You will see what I have below, but there should be an option near the top that says 'Retry Suspended Task' or 'Retry'.  Click that, and it should retry that email activity for you and continue on.

Rick

Did you ever find a resolution for this issue?  I've having it on multiple instances.

Actually, I did some investigating into the database and was able to figure out a work-around...  Thought I'd share it here in case it helps anyone else.

This query will show email tasks that are stuck in this state.

SELECT *
FROM [LFForms].[dbo].[cf_bp_worker_instances] AS wi
JOIN [LFForms].[dbo].[cf_bp_worker_instance_history] AS history ON wi.[instance_id] = history.[instance_id]
JOIN [LFForms].[dbo].[cf_bp_steps] AS step ON wi.[current_step_id] = step.[step_id] AND wi.[current_process_id] = step.[process_id]
WHERE wi.[status] = 3 AND history.[finish_date] IS NULL AND step.[step_sub_type] = 'email'

If these are the same email tasks you are struggling with, then these two update queries will force them into a suspended state.  Once in a suspended state, you can just re-try them from Monitor page in LFForms.

UPDATE [LFForms].[dbo].[cf_bp_worker_instance_history]
SET [status] = 'suspended'
FROM [LFForms].[dbo].[cf_bp_worker_instances] AS wi
JOIN [LFForms].[dbo].[cf_bp_worker_instance_history] AS history ON wi.[instance_id] = history.[instance_id]
JOIN [LFForms].[dbo].[cf_bp_steps] AS step ON wi.[current_step_id] = step.[step_id] AND wi.[current_process_id] = step.[process_id]
WHERE wi.[status] = 3 AND history.[finish_date] IS NULL AND step.[step_sub_type] = 'email';

UPDATE [LFForms].[dbo].[cf_bp_worker_instances]
SET [status] = 11
FROM [LFForms].[dbo].[cf_bp_worker_instances] AS wi
JOIN [LFForms].[dbo].[cf_bp_worker_instance_history] AS history ON wi.[instance_id] = history.[instance_id]
JOIN [LFForms].[dbo].[cf_bp_steps] AS step ON wi.[current_step_id] = step.[step_id] AND wi.[current_process_id] = step.[process_id]
WHERE wi.[status] = 3 AND history.[finish_date] IS NULL AND step.[step_sub_type] = 'email';