Aşağıdaki kodu htaccessde kullanır mısınız?
@Bebeim; @Subebul;

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_HOST} ^eskisite.com$ [OR]
RewriteCond %{HTTP_HOST} ^www.eskisite.com$
RewriteRule ^(.*)$ "https://www.yenisite.com/$1" [R=301,L]
RewriteCond %{HTTP_HOST} !^www.yenisite.com/
RewriteRule (.*) http://yenisite.com//$1 [R=301,L]
RewriteBase /
RewriteRule ^index.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress