More tests for #1191

[DenBond7]

I've added some tests. Need to add more tests for different cases. It will be for a separate issue.

Originally posted by @DenBond7 in #1191 (comment)

[DenBond7]

• Test subject longer 5 lines
• Test a message with no Reply-To
• Test a message with no Cc
• Test Personal <user@test> and just user@test
• Test more than 10 recipients for a single field