TOPIC: Can the abbreviation to be used?

Hi,
My boss told me that never should i use the abbreviation when writing the emails to business. She said it's impolite. However, i think that's more simple and clear to the business.
Can you tell me is that right?

Hi

Thanks for your question.

It's best to write out words in full when you're sending a business email. Only use abbreviations if you're writing to a close colleague who 1) you frequently correspond with 2) who is familiar with the abbreviations you use.

Hope the advice helps.

Regards

Workplace English Expert