Capture multiple email address from a form using single field.

We have been trying to tackle this problem and would love to hear anyone's ideas.  We get a lot of personal email addresses and then at some point end up getting their true business emails.  I would like to maintain both as well (especially from an opt in perspective) and have the ability to send communications to both email addresses without having to maintain duplicate lead records or rather choosing which email address I think is better to keep.  In the ecomm industry it seems that people move around quickly and it is extremely useful for us to have their personal email address as they jump to different companies to keep in touch with them.

This can be accomplished through custom coding, mainly JavaScript and XML.

The idea is:

1. the field is "string" because email will check validation rules outlined by 2822
http://tools.ietf.org/html/rfc2822

2. the multiple addresses in the single fields are separated by comma or semicolon;

3. A JavaScript will read the entire string, set a while loop to identify each email until a comma/semicolon is reached or the end of that string is reached;

4. The SOAP call syncMultipleLeads would send them to Marketo;

5. SOAP importToList, listOperation or requestCampaign would add the leads to the appropriate containers;


I do not see a tangible benefit going that route.

The email field allows to validate against very standard rules.
Having a single field will loose that functionality.
Furthermore you have no simple way to find the correct email if the original entry is invalid.
That can cause high rates of hard bounces.

There is a great Idea related to Marketo intelligently managing two email addresses at https://community.marketo.com/MarketoIdeaDetail?id=08750000000IOOrAAO - please vote for it.