My partner/spouse and I share an email address -- Why does the SDB send us two emails when sending information out from our center?
For physical mail, the SDB can consolidate partners.  Consolidating partners for email is not a high priority -- There are lots of other things that we need to enhance on the system.

If you want to solve this problem, perhaps one of the two of you could set up your own email.  You'd still get two emails, but each of you would know which one is yours.

Seriously, it would be better if each of you had your own email address, so that you could know what mail is for each individual.  These days there are lots of companies that will give you a free email address.  We like google, but there is also yahoo and hotmail and scads of others.