aerc implements the SMTP protocol as specified by RFC 5321.
SMTP configuration may be done interactively with the :new-account command.
In accounts.conf (see aerc-accounts(5)), the following SMTP-specific options are available:
outgoing = <scheme>[+<auth>]://<username>[:<password>]@<hostname>[:<port>]?[<oauth2_params>]
Remember that all fields must be URL encoded. The @ symbol, when URL encoded, is %40.
The value of <scheme> can be:
SMTP with STARTTLS
SMTP without STARTTLS
SMTP with TLS/SSL
Additionally, you can specify an authentication mechanism like so:
No authentication is required to use this SMTP server. You may omit the username and password in this case.
Authenticate with a username and password using AUTH PLAIN. This is the default behavior.
Authenticate with a username and password using AUTH LOGIN. This is an obsolete protocol, but is required for some common webmail providers.
SMTP with TLS/SSL using OAUTHBEARER Authentication. See documentation in aerc-imap(5) for usage.
SMTP with TLS/SSL using XOAUTH2 Authentication. See documentation in aerc-imap(5) for usage.
outgoing-cred-cmd = <command>
Specifies the command to run to get the password for the SMTP account. This command will be run using sh -c [command]. If a password is specified in the outgoing option, the password will take precedence over this command.
outgoing-cred-cmd = pass hostname/username
smtp-domain = <domain>
Local domain name to use in the HELO/EHLO SMTP command. Set this to a fully qualified domain name if the server requires it as an antispam measure.
Originally created by Drew DeVault <email@example.com> and maintained by Robin Jarry <firstname.lastname@example.org> who is assisted by other open source contributors. For more information about aerc development, see https://sr.ht/~rjarry/aerc/.
aerc(1), aerc-accounts(5), aerc-config(5), aerc-maildir(5), aerc-notmuch(5).