diff --git a/R/send_by_mailgun.R b/R/send_by_mailgun.R
index 10b0bf9d..c22621b4 100644
--- a/R/send_by_mailgun.R
+++ b/R/send_by_mailgun.R
@@ -16,7 +16,7 @@
 #' addresses.
 #' @param url the URL for the sending domain.
 #' @param api_key the API key registered to
-#' the mailgun service.
+#' the Mailgun service.
 #' @examples
 #' \dontrun{
 #' # Create a simple email message using
@@ -72,6 +72,7 @@ send_by_mailgun <- function(message,
     subject_text <- glue::glue(subject)
   }
 
+  # Collapse vector of recipients to a single string
   recipients <- paste(recipients, collapse = ", ")
 
   # Post the message to Mailgun
diff --git a/R/send_email_out.R b/R/send_email_out.R
index d951ad81..8af1efea 100644
--- a/R/send_email_out.R
+++ b/R/send_email_out.R
@@ -18,7 +18,7 @@
 #' message, which is usually a brief summary
 #' of the topic of the message.
 #' @param cc a vector of email addresses
-#' for sending the messsage as a carbon
+#' for sending the message as a carbon
 #' copy. This list of for those who are to
 #' receive a copy of a message addressed
 #' primarily to another. The list of
@@ -68,7 +68,7 @@
 #' @param use_tls a logical value to
 #' indicate whether to use TLS.
 #' @param authenticate a logical value to
-#' indicate whether to use authenication.
+#' indicate whether to use authentication.
 #' @param ehlo a logical value to indicate
 #' whether to force an EHLO command after
 #' connection to the SMTP host.
diff --git a/man/send_by_mailgun.Rd b/man/send_by_mailgun.Rd
index 7f9c1697..7804f127 100644
--- a/man/send_by_mailgun.Rd
+++ b/man/send_by_mailgun.Rd
@@ -26,7 +26,7 @@ addresses.}
 \item{url}{the URL for the sending domain.}
 
 \item{api_key}{the API key registered to
-the mailgun service.}
+the Mailgun service.}
 }
 \description{
 Send an email message via the Mailgun API.
diff --git a/man/send_email_out.Rd b/man/send_email_out.Rd
index ced994e8..ba9818b3 100644
--- a/man/send_email_out.Rd
+++ b/man/send_email_out.Rd
@@ -32,7 +32,7 @@ message, which is usually a brief summary
 of the topic of the message.}
 
 \item{cc}{a vector of email addresses
-for sending the messsage as a carbon
+for sending the message as a carbon
 copy. This list of for those who are to
 receive a copy of a message addressed
 primarily to another. The list of
@@ -96,7 +96,7 @@ indicate whether to use SSL.}
 indicate whether to use TLS.}
 
 \item{authenticate}{a logical value to
-indicate whether to use authenication.}
+indicate whether to use authentication.}
 
 \item{ehlo}{a logical value to indicate
 whether to force an EHLO command after