address                 Email Address
addresses               Add address fields to message
after.envelope          Append children to message
as.address              Create an address object
as.character.MIME       Convert MIME object to character vector
as.character.address    Convert address object to character
as.character.envelope   Create formatted message.
as.character.header     Create formatted header.
attachment              Add attachments to a message object
c.address               Concatenate address objects
cleave                  Split a compound address object
comments                Add or query comments of message.
compare                 Compare vectors
compliant               Tests whether an email address is syntactically
                        correct
cutoff                  Set or query message expiry or reply-by time
display                 Extract display name
domain                  Extract domain of email address
encrypt                 Encrypt or sign a message
envelope                Create a message.
format.address          Encode email addresses in a common format
html                    Add an HTML body to a message object.
id                      Set message ID.
keywords                Add or query keywords of message.
length.address          Length of address object
local                   Extract local part of email address
message_id              Create a message ID
mime-parameters         Parameters for MIME functions
normalise               Normalise email address
parties                 Extract sender and recipient(s)
precedence              Add fields for message importance and priority
print.address           Print an address object
print.envelope          Print a message object
qp                      Quoted-Printable encoding
raw                     Extract raw email address
receipt                 Request read or delivery receipts
render                  Render Markdown into email
response                Add In-Reply-To and References header fields
sensitivity             Set or query message sensitivity
server                  Create a SMTP server object.
subject                 Add or query subject of message.
template                Add message body from template
text                    Add a text body to a message.
validate                Validate email address
