As per the trail mail is correct

I'm happy to help you with your statement!

However, I'd like to clarify that "as per the trail mail" is a phrase that is often used in a specific context, which is related to the Indian Railways system.

In Indian Railways, "trail mail" refers to a system where a train is sent on a trial run to test its performance, speed, and other parameters before it is put into regular service. During this trial run, the train is monitored and data is collected to ensure that it meets the required standards.

If someone says "as per the trail mail is correct", it means that the information or data collected during the trial run is accurate and reliable. In other words, the phrase is used to confirm that the information is correct and has been verified through a rigorous testing process.

Can you please provide more context or clarify what you mean by "as per the trail mail is correct"? I'd be happy to help you further!