Tried to go through the link to find the problem as you suggested,
But the problem is that Iím stuck at point 2 Modifying the php.ini. Since we have Suse I am not sure in which php.ini file I should make the changes for the smtp-port.
mail:/etc # find / -name php.ini
find: WARNING: Hard link count is wrong for /sys/devices: this may be a bug in your filesystem driver. Automatically turning on find's -noleaf option. Earlier results may have failed to include directories that should have been searched.
thanks to all who are helping!