Alert manager config not working

[Ilhem Hamdi]

HEllo , 

I modified the alermanger.yml configuration in order to  get email alerts:

Here is my configuration , For information the SMTP server is internal and we have direct access to 

global:
  smtp_smarthost: SMTP_hostname
  smtp_from: company@
  smtp_require_tls: false
route:
  receiver: alert-mails
  group_wait: 30s
  group_interval: 1m
  repeat_interval: 30m

receivers:
- name: alert-mails
  email_configs:
  - to: my personal comapny@

It does not work , I changed the config many times , what am I missing  , FY I deleted the old default config with the slack since I will not using it and I replace it with the config above 

Thanks for your help guys