Check for the localpart size.

[jcbf]

Fix for #50

[codecov]

Codecov Report

Merging #51 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #51      +/-   ##
==========================================
+ Coverage   87.22%   87.25%   +0.02%     
==========================================
  Files           1        1              
  Lines         501      502       +1     
==========================================
+ Hits          437      438       +1     
  Misses         64       64

Impacted Files	Coverage Δ
smf-spf.c	87.25% <100%> (+0.02%)	⬆️

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[coveralls]

Coverage increased (+0.02%) to 87.402% when pulling 161a46b on jcbf/check_local_part into 821db04 on master.

[coveralls]

Coverage increased (+0.02%) to 87.402% when pulling 161a46b on jcbf/check_local_part into 821db04 on master.