$content
$content : string
Message part content
Simple message part class
setContent(string  $content) : \Pop\Mail\Message\AbstractPart
                Set message part content
| string | $content | 
addHeader(string $header, string $value) : \Pop\Mail\Message\AbstractMessage
Add message part header
| string | $header | |
| string | $value | 
addHeaders(array  $headers) : \Pop\Mail\Message\AbstractMessage
                Add message part headers
| array | $headers | 
setContentType(string  $contentType) : \Pop\Mail\Message\AbstractMessage
                Set message part content type
| string | $contentType | 
setCharSet(string  $charSet) : \Pop\Mail\Message\AbstractMessage
                Set message part character set
| string | $charSet | 
setIdHeader(string  $header) : \Pop\Mail\Message\AbstractMessage
                Set the ID header name
| string | $header | 
setId(string  $id) : \Pop\Mail\Message\AbstractMessage
                Set the ID
| string | $id |