[EAS] US Postal Service also tells customers to change TLS

[Sean Donelan]

Its not just FEMA.  I also got a notification from the U.S. Postal Service 
about TLS changes to its electronic web services.  Most other agencies 
have been moving a little faster than FEMA.  USPS has ceased support for 
TLS 1.1 and TLS 1.0 today.

USPS has been telling its customers about the TLS change for at least six 
months. Likely longer, I just don't have my older USPS service change 
messages.

All USPS mail support vendors should have already updated their software.

From: EPF Administration <BXDMM0 at usps.gov>

CRITICAL NOTE:

Dear EPF Customer,

On March 12, 2019, we notified all EPF customers that we would be applying a
network patch to our EPF servers on April 1, 2019. This patch may have caused
your web connections to fail if your web services client software was not up to
date and not using TLS 1.2 encryption protocol. Effective today, July 31st,
2019, EPF will require all connections to use the TLS 1.2 protocol.

USPS servers require use of the HTTPS security protocol and this upgrade will
BLOCK any traffic requests not using TLS 1.2 or above (TLS 1.3 is just rolling
out to the web).

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