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Fork and deliver message in background. If you use this option, you should also use --outbox to handle delivery failures.

show this help message and exit

Host name of localhost. Used when connecting to SMTP server.

Path to maildir folder to store failed email messages in.

Timeout for connection

Be more verbose

show program's version number and exit

Options to compose an email. Ignored if text is not specified

File to attach to the email

Subject of the email

Options to use an SMTP relay server to send mail. calibre will try to send the email directly unless --relay is specified.

Path to a file of concatenated CA certificates in PEM format, used to verify the server certificate when using TLS. By default, the system CA certificates are used.

Do not verify the server certificate when connecting using TLS. This used to be the default behavior in calibre versions before 3.27. If you are using a relay with a self-signed or otherwise invalid certificate, you can use this option to restore the pre 3.27 behavior

Encryption method to use when connecting to relay. Choices are TLS, SSL and NONE. Default is TLS. WARNING: Choosing NONE is highly insecure

Password for relay

Port to connect to on relay server. Default is to use 465 if encryption method is SSL and 25 otherwise.

An SMTP relay server to use to send mail.

Username for relay

Kovid Goyal

Kovid Goyal