USCIS Service Centers Contact Email Addresses Discontinued as of January 21, 2019

​As of January 21, 2019, USCIS Discontinues Case-Specific Assistance Via Service Center Email
Instead, USCIS is directing people to its online self-help tools and the USCIS Contact Center. Call the USCIS Contact Center at 800-375-5283 or submit an online request here.

The service center email addresses being discontinued are:

California Service Center: csc-ncsc-followup@uscis.dhs.gov
Vermont Service Center: vsc.ncscfollowup@uscis.dhs.gov
Nebraska Service Center: NSCFollowup.NCSC@uscis.dhs.gov
Potomac Service Center: psc.ncscfollowup@uscis.dhs.gov
Texas Service Center: tsc.ncscfollowup@uscis.dhs.gov

More information is here.