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return _result(CU_SMTP_UNREACHABLE, 'Cannot connect SMTP servers: ' . ... $ok = 1 if $code == CU_OK; $ok = 1 if $code == CU_SMTP_UNREACHABLE; ...
if (Mail::CheckUser::last_check()->{code} == CU_SMTP_UNREACHABLE) { # can't reach server ... }