Thank you Robin for the response.
1. My emails are setup to come from correct address like eg fred@mysite.com
2. Emails are going out from the wordpress for other activities except for “Subscribe” action.
3. Tried the “Asyncronous-bbpress-subscriptions” plugin to fix the email issue on the plugin – it dint work for me.
Is the email on subscription a default behavior of bbPress. Ideas to fix it is appreciated.
Thanks.