v0.2.3: Bug fix

• Fix problem with multibyte mailbox name encoding.
• Fix encoded header size calculation.

v0.2.2: Bug fix

• Fix invalid header body encoding when including both of the multibyte chars and the white spaces.

v0.2.1: fix content check error

• fix an error occurred when email includes only html message.
• add connection_interval argument to Sender#start (default: 200 [ms])

v0.2.0: Add concurrent sending

• add EMail::Sender object to send messages concurrently.
• add log_io option to EMail.send and other method to change log output.

...and some internal optimizations.

v0.1.8: Remove unnecessary base64 encoding for text message.

Now, plain text message and html message will be encoded only when they have non-ascii characters or lines that is 999 bytes or longer.

v0.1.7: Bug fix

• Tentatively fix a problem when message body has line including only "."

v0.1.6: add HTML e-Mail support

Changes from v0.1.3

• fix problems with STARTTLS
• add AUTH LOGIN support
• add HTML e-mail support

v0.1.3: Merge pull request #5 from arcage/work

crystal 0.20.3