Kami menggunkaan Rocky Linux 9.4 (Blue Onyx) dengan kondisi service postfix sudah diinstall.

• Buat file sasl_passwd di direktori /etc/postfix

# vim /etc/postfix/sals_passwd

• isikan konfigurasi authentication dari server SMTP Relay

relay.domain.com rizkiana.my.id:passwordsmtprelay

• Postmap file sasl_passwd

# postmap sasl_passwd

• Buka file /etc/postfix/main.cf untuk konfigurasi relay (sesuaikan dengan konfigurasi relay yang diberikan oleh provider)

# vim /etc/postfix/main.cf


relayhost = [relay.domain.com]:587
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_use_tls = yes
smtp_tls_security_level = may
mynetworks = 127.0.0.0/8 IP-ADDRESS-SMTPLAIN/32

• Restart service postfix

# systemctl restart postfix

• Lakukan pengtetesan email dan pantau log /var/log/maillog, apabila anda mendapatkan error seperti berikut :

Jun  5 18:54:19 rocky postfix/smtp[7541]: AB437F201CB: to=<yogi@rizkiana.my.id>, relay=relay.domain.com[IP ADDRESS RELAY]:587, delay=9.5, delays=8.1/0/1.4/0, dsn=4.7.0, status=deferred (SASL auth
entication failed; cannot authenticate to server relay.domain.com[IP ADDRESS RELAY]: no mechanism available

• Install package pendukung

# yum install cyrus-sasl-plain

• Lakukan pengtetesan email kembali dan pantau log /var/log/maillog, apabila anda mendapatkan error seperti berikut :

Jun  5 19:23:11 rocky postfix/smtp[7541]: AB437F201CB: to=<yogi@rizkiana.my.id>, relay=relay.domain.com[IP ADDRESS RELAY]:587, delay=859, delays=841/0.1/1.1/17, dsn=2.0.0, status=sent (250 OK id=1sEpR6-004NfN-6t)

Baca juga : Mengatasi Tracking Center Log Proxmox Mail Gateway Kosong (Tidak Muncul)

Semoga bermanfaat & enjoy. Wassalamualaikum

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