Should i submit relieving letter from x company as well to Y company or it would be better to wait if they need would
submit to them.
Since your new company has not insisted on submitting relieving letter from new company, you may wait until they demand it.
What will happen if HR make an issue after 1 year and if they terminated me due to same reason in future.It will affect my future employment too.How should i avoid this.
If you are worried of a situation, you may tender the relieving letter in your possession, but this is not required in the given situation.
3.There are many Hr's in organisation then sending above email to one specific HR who interacted with me would be enough.
HRs are not bosses of the company. The HR under whom the recruitment process is going on will be the right person.
4.what is about last mail where i specified wrong company name is that still needs ro be corrected.
5.Should i send above mail to my manager as well who asked me to abscond and join.
If you pursue the above two issues, you will be inviting trouble for yourself.