Trim nulls issue

Fixed PHP8 trim nulls deprecation message
Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated

PHP8 hotfix

Since PHP 8 the message parameter given to mail() function must starts with an empty newline "\n".
Otherwise email will be sent with empty body.

Reply-to feature and headers improvements

Added getter/setter to change "Reply-to" field.

Headers are now manipulated by header-name.

Composer support

MultipartEmail now available via composer!

composer require aleksandr.ru/multipart-email

🎉️