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sokratisg / Postfix: sender-dependent SASL authentication.md
Created April 24, 2017 10:35 — forked from zmwangx/Postfix: sender-dependent SASL authentication.md
Postfix: sender-dependent SASL authentication — relay to multiple SMTP hosts, or relay to the same host but authenticate as different users (e.g., two Gmail accounts)

This is a sequel to "Postfix: relay to authenticated SMTP".

I would like to send mail from two different Gmail accounts using Postfix. Here is the relevant section in the Postfix documentation: Configuring Sender-Dependent SASL authentication.

As a concrete example, here's how to set up two Gmail accounts (only relevant sections of the config files are listed below):

/etc/postfix/main.cf:
    # sender-dependent sasl authentication
    smtp_sender_dependent_authentication = yes

sender_dependent_relayhost_maps = hash:/etc/postfix/sender_relay

---
148:
- 4
- :nf_f_conn_id
8:
- 4
- :nf_f_src_addr_ipv4
7:
- 2
- :nf_f_src_port