rw- 1 root wheel 16384 May 15 14:28 passwd.dbĬode language: Shell Session ( shell ) Testing The Gmail SMTP Relay ServiceĪnd that’s all you have to do! The postfix service is automatically loaded by launchctl when your Mac starts up. After we create the file, we will again use postmap to create the machine readable version: It can go anywhere I decided to create a subdirectory, sasl, to store it in. Next, we need to create the hashed passwd file. The second mapping in the generic file is a catchall for any user on your machine. To determine what the first mapping should be. $ echo `hostname` Code language: JavaScript ( javascript ) Add lines similar ( but use your actual account names) to the following at the end of the file and run postmap to generate the machine readable file, generic.db: $ cd /etc/postfix The generic mapping file should exist already. The second one, sasl/passwd, contains our Gmail account App password in a machine readable format. The first one, generic, will create a mapping from our local machine account name to the Gmail account name. We need to create a couple of support files.
Smtp_sasl_password_maps = hash:/etc/postfix/sasl/passwd Smtp_generic_maps = hash:/etc/postfix/generic # After creating the 'generic' file, do: # sudo postmap /etc/postfix/generic # Map local email to a real email address. macOS Postfix SMTP Configuration for Gmailįirst, we need to add the following lines to /etc/postfix/main.cf using your favorite editor and sudo: $ cd /etc/postfix Setting up Postfix to relay locally originated email through your Gmail account is much simpler that trying to build a full-fledge email server. Email from your local machine will appear to originate from your Gmail account. I understand that the limit is about 99 emails per day. The Gmail SMTP service is free to use for limited, personal emails. Do not use your main Gmail account password. You will also need to set up an App password to use in your Postfix configuration.
You will need to have an existing Gmail account. We only need to configure it to use Google’s SMTP service. Postfix is already installed and ready to go. However, if something is not clear, please let me know. This post is for those who are developers and are familiar with using the command line in a Linux-like environment.
However, we can use the built-in mail command to run a simple test after we complete our configuration work. For example, after installing WordPress, it generates an email message announcing a successful install. Why? I am creating a local website development environment where PHP applications may generate email messages for contact forms or notifications. This post describes how I configured Postfix on my Mac to relay outbound email via Google’s SMTP service.
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