Not able to get gpg keys on email while uploading lib to bintray.com

I am using this tutorial to upload my android lib to bintray.com

I am following below steps to upload lib:

1. gpg --gen-key
2. gpg --list-keys
3. gpg --keyserver hkp://pool.sks-keyservers.net --send-keys PUBLIC_KEY_ID
4. gpg -a --export yourmail@email.com > public_key_sender.asc
5. gpg -a --export-secret-key yourmail@email.com > private_key_sender.asc

I have replaced PUBLIC_KEY_ID with my key id, same for email as well.

I am not getting why I am not receiving emails?.

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