Mail Relay

Cómo enviar emails a través de otro servidor de correo

Why is SMTP blocked in DigitalOcean.com?

Alternativas?

VPS:

Kamatera

Mail Relay:

How to Set Up SMTP Relay Between 2 Postfix SMTP Servers on Ubuntu

sudo nano /etc/postfix/main.cf

relayhost = mail.alumno.me:587

# outbound relay configurations
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_security_level = may
header_size_limit = 4096000

sudo nano /etc/postfix/sasl_passwd

mail.alumno.me:587      usuario@alumno.me:***********

sudo postmap /etc/postfix/sasl_passwd

sudo systemctl restart postfix

sudo chmod 0600 /etc/postfix/sasl_passwd /etc/postfix/sasl_passwd.db

Probar el envío de correo:

mail -s "Email de prueba" paco.portada@protonmail.com <<< "Este es el cuerpo del correo"

Más información:

How to Set Up Postfix SMTP Relay on Ubuntu with Sendinblue

How to Set up Postfix SMTP Relay on Ubuntu with Mailjet