old_contents: # Virtual alias file syntax:
  # email, space, email, (space, email, space, email,) newline, (repeat)
  # Example:
  # groep@arenbergorkest.be 	jef@gmail.com jos@hotmail.com
  # jef@arenbergokest.be 		jef@gmail.com
  
  # Catchall alias email = '@arenbergorkest.be'
  
  from email_aliases import aliases
  
  c = '' # New content of postfix virtual aliases file
  for alias in aliases:
  	c += '{} {}\n'.format(alias.email+'@arenbergorkest.be', ' '.join(alias.destinations))
  
  
  from subprocess import call
  
  VIRTUAL_ALIAS_FILE = '/etc/postfix/virtual'
  with open(VIRTUAL_ALIAS_FILE, 'w') as f:
  	f.write(c)
  call(['sudo', 'postmap', VIRTUAL_ALIAS_FILE])
  
new_contents: # Virtual alias file syntax:
  # email, space, email, (space, email, space, email,) newline, (repeat)
  # Example:
  # groep@arenbergorkest.be 	jef@gmail.com jos@hotmail.com
  # jef@arenbergokest.be 		jef@gmail.com
  
  # Catchall alias email = '@arenbergorkest.be'
  
  from email_aliases import aliases
  
  c = '' # New content of postfix virtual aliases file
  for alias in aliases:
  	c += '{} {}\n'.format(alias['email']+'@arenbergorkest.be', ' '.join(alias['destinations']))
  
  
  from subprocess import call
  
  VIRTUAL_ALIAS_FILE = '/etc/postfix/virtual'
  with open(VIRTUAL_ALIAS_FILE, 'w') as f:
  	f.write(c)
  call(['sudo', 'postmap', VIRTUAL_ALIAS_FILE])
  
subject: Fix python syntax bug in update email fwd's script