Feature/Allow special characters in email regex pattern

[bestwebua]

• Updated emailRegexPattern constant
• Updated mailfrom/rcptto handlers tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (d398e98) to head (7fa9deb).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop      #207   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines          849       849           
=========================================
  Hits           849       849           

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