The fastest way to address an individual envelope would be with a simple label printer. Then you just need to print next to the address. As the top space is at a premium we are currently not adding zip codes there too.
https://jlssolutions.com/QA/39/label-printer?show=39#q39
tiferesmoshe of Tiferes Moshe - Jun 23, 2025
HBreski of Vien High School Boro Park - Jun 23, 2025
s laufer of Bnei Yoel - Jun 16, 2025
SteinerShulem of uta - Jun 15, 2025
Moses of Ahavat Torah Lakewood - Jun 10, 2025
Rivky Klein of Yeshivos Vyelipol - Jun 10, 2025
malky wiener of yeshivah darchei torah - Jun 05, 2025
B. Jacobawitz of Bnai Yoel - May 28, 2025
dlphillipson of Bais Yaakov Elementary Toronto - May 26, 2025