Have you tried this plugin? http://wordpress.org/plugins/welcome-pack/
Also I think this is the buddypress function that has a filter to change from functions.php
COPY CODE
function bp_get_email_subject( $args = array() ) {
$r = wp_parse_args( $args, array(
'before' => '[',
'after' => ']',
'default' => __( 'Community', 'buddypress' ),
'text' => ''
) );
$subject = $r['before'] . wp_specialchars_decode( bp_get_option( 'blogname', $r['default'] ), ENT_QUOTES ) . $r['after'] . ' ' . $r['text'];
return apply_filters( 'bp_get_email_subject', $subject, $r );
}
Hi there!!! Help others from the community and mark any reply as solution if it solved your question. Mark as a solution