DevOps & SysAdmins: Error: Could not execute mail delivery program '/usr/sbin/sendmail' 1:48 | A processar vídeo... A Carregar... Transferir
![Unix & Linux: Sendmail error dsn=4.0.0 stat=Deferred: Connection refused by [127.0.0.1]](https://i.ytimg.com/vi/lNPr2zCSZ18/hqdefault.jpg)
