[DATE, ex. Monday, March 31, 2008]

[NAME, COMPANY AND ADDRESS, ex.
Link Building
XYZ Inc.
1234 First Street
Suite 567
Anycity, Anystate  85245]

Dear [NAME, ex. Link Building],

I just recently heard of the good news.  Congratulations on your newly-born [son / daughter]!  I’m certain the new addition to your family will bring you much happiness and enjoyment, not to mention several sleepless nights.

Please give my best to your family; I look forward to meeting [NAME, ex. Corey] in the near future.

Best regards,

[YOUR NAME, ex. Jill Jones]