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Can you please provide suggestions to improve the following passage.

"Kudos to Indian Postal Department. For the past 150 years it is has done lot of miracles in our country. Delivering letters to the remote villages at right is its unique style. As a citizen of India some how we are enjoying its esteem service in our daily life. After the invention of email, its service has slightly slumped and got the name snail-mail. It seems, it is taking rest after a marathon race, but it is mandatory to promote its service by come up with new flavours."

Thanks,
SS
Comments  
Kudos to the Indian Postal Department. For the past 150 years it is has been performing miracles in our country. Delivering letters to the remote villages ... is its unique style. As citizens of India we are enjoying its excellent service in our daily lives. After the invention of e-mail, its service has slightly fallen off and has got the name "snail-mail". It seems to be taking a rest after a marathon race, but it is now vital that it promote its service by coming up with new ...

at right ??? at night ???

flavours ??? advertising campaigns ??? services ??? products ??? innovations ???
Thanks CalifJim,

1. it is 'at right', I would like to mention its accuracy in time.
2. I would like to use flavour to denote 'Variety'

Please give your suggestions regarding this.

Thanks,
SS
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Kudos to the Indian Postal Department. For the past 150 years it is has been performing miracles in our country. Delivering letters promptly to the remote villages is its unique style. As citizens of India we are enjoying its excellent service in our daily lives. After the invention of e-mail, its service has slightly fallen off and has got the name "snail-mail". It seems to be taking a rest after a marathon race, but it is now vital that it promote its service by coming up with a greater variety of services and products.

("coming up with new variety/a greater variety" is not possible in English; you'd have to say "variety of something")
Thanks CalifJim
i m confused by one statement here. Is it appropriate to say "it is has......."; I think its the second line. I havent come across with this type of sentence.
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Its only a typing mistake.