With the SetHeaderPreformatted() method we have the ability to set headers that are already preformatted by the user and will not be altered in the mail message output
By default, the encoding/base64 in Go does not add line breaks to its output.
This patch introduces the Base64LineBreaker which satisfies the io.WriteCloser interface
Attachments are now correctly broken up into maximum of 76 chars
# SUMMARY
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* Unused licenses:
* Used licenses: CC0-1.0, MIT
* Read errors: 0
* Files with copyright information: 45 / 45
* Files with license information: 45 / 45
Congratulations! Your project is compliant with version 3.0 of the REUSE Specification :-)
- Added `EnvelopeFrom()` and `EnvelopeFromFormat()` methods analogous to the `From()` `FromFormat()` methods
- Changed MsgWriter logic for envelope from addresses
- Adjusted `Msg.GetSender()` to return the envelope from first and only mail body from if the envelope is not set
- The writeHeader() method wasn't producing good output for long headers. This has been fixed
- Added a VERSION string to the library
- If both no User-Agent and no X-Mailer header are set, the lib adds a default UA-header