[SalesForce] 500 Server Error on Smart Capture Form

When linking to the landing page from the email, use the syntax

<A title="Go here" href="%%microsite_base_url[default]741416[/default]%%">Go here</A> 

That will create a link that is contextual to that subscriber, then on the landing page simple substitution can be used: %%LastName%%

Source: https://help.exacttarget.com/en/documentation/exacttarget/content/microsites/landing_pages/

If your sales team is using a distribution group so that a single email address is used to email the group, you can use Journey Builder to send an email for each record added through your form.

When creating the Data Extension for the form, you will want to have the field for EmailAddress configured to be populated with the email address for your Sales team. Make the EmailAddress field a hidden field and enter the email address for your Sales team.

If you are collecting a subscriber's email address, you will want to use a Text data type for the field so that it does not cause issues with the emails sent to the Sales Team and be sure that you are associating the field for the Sales Team to SubscriberKey so that the contact flowing through the journey is the contact associated to the Sales Team email address. This will also make sure you aren't overwriting any existing subscribers email addresses with the Sales Team's email address.

When setting up your journey be sure to update the settings to allow re-entry at any time in case you have multiple subscribers fill out the form at the same time.