address                 Email Address
addresses               Add address fields to message
append.envelope         Append children to message
as.address              Create an address object
as.character.envelope   Create formatted message.
as.character.header     Create formatted header.
as.character.MIME       Convert MIME object to character vector
as.character.vctrs_address
                        Convert address object to character
attachment              Add attachments to a message object
compare                 Compare vectors
compliant               Tests whether an email address is syntactically
                        correct
display                 Extract display name
domain                  Extract domain of email address
envelope                Create a message.
format.vctrs_address    Encode email addresses in a common format
html                    Add an HTML body to a message object.
local                   Extract local part of email address
new_address             Helper function for creating address objects
parties                 Extract sender and recipient(s)
precedence              Add fields for message importance and priority
print.envelope          Print a message object
print.vctrs_address     Print an address object
qp_decode               Decode a quoted-printable string.
qp_encode               Encode a string to quoted-printable.
raw                     Extract raw email address
render                  Render Markdown into email
server                  Create a SMTP server object.
subject                 Add or query subject of message.
text                    Add a text body to a message.
