Main code has high complexity score (400) at line 1, column 1.  Consider refactoring.  (Severity: 3)
Regular expression without "/x" flag at line 1121, column 33.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 1130, column 33.  See page 236 of PBP.  (Severity: 3)
Code structure is deeply nested at line 1651, column 41.  Consider refactoring.  (Severity: 3)
Reused variable name in lexical scope: $sync at line 1823, column 2.  Invent unique variable names.  (Severity: 3)
Hard tabs used at line 1849, column 22.  See page 20 of PBP.  (Severity: 3)
Reused variable name in lexical scope: $sync at line 1933, column 2.  Invent unique variable names.  (Severity: 3)
Regular expression without "/x" flag at line 1982, column 29.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 2004, column 31.  See page 236 of PBP.  (Severity: 3)
Reused variable name in lexical scope: $sync at line 2013, column 2.  Invent unique variable names.  (Severity: 3)
Reused variable name in lexical scope: $sync at line 2036, column 2.  Invent unique variable names.  (Severity: 3)
Regular expression without "/x" flag at line 2069, column 30.  See page 236 of PBP.  (Severity: 3)
Reused variable name in lexical scope: $sync at line 2080, column 53.  Invent unique variable names.  (Severity: 3)
Reused variable name in lexical scope: $sync at line 2088, column 2.  Invent unique variable names.  (Severity: 3)
Reused variable name in lexical scope: $sync at line 2136, column 2.  Invent unique variable names.  (Severity: 3)
Regular expression without "/x" flag at line 2172, column 26.  See page 236 of PBP.  (Severity: 3)
Reused variable name in lexical scope: $nb_errors at line 2220, column 2.  Invent unique variable names.  (Severity: 3)
Too many arguments at line 2256, column 1.  See page 182 of PBP.  (Severity: 3)
Too many arguments at line 2274, column 1.  See page 182 of PBP.  (Severity: 3)
Too many arguments at line 2284, column 1.  See page 182 of PBP.  (Severity: 3)
Subroutine "modules_VERSION" with high complexity score (25) at line 2401, column 1.  Consider refactoring.  (Severity: 3)
Too many arguments at line 2570, column 1.  See page 182 of PBP.  (Severity: 3)
Too many arguments at line 2603, column 1.  See page 182 of PBP.  (Severity: 3)
Subroutine "authenticate_imap" with high complexity score (21) at line 2671, column 1.  Consider refactoring.  (Severity: 3)
Too many arguments at line 2671, column 1.  See page 182 of PBP.  (Severity: 3)
Too many arguments at line 2776, column 1.  See page 182 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 2850, column 51.  See page 236 of PBP.  (Severity: 3)
Backtick operator used at line 2858, column 12.  Use IPC::Open3 instead.  (Severity: 3)
Return value of eval not tested at line 2992, column 2.  You can't depend upon the value of $@/$EVAL_ERROR to tell whether an eval failed.  (Severity: 3)
"die" used instead of "croak" at line 3037, column 2.  See page 283 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3145, column 15.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3146, column 15.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3147, column 15.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3156, column 8.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3157, column 8.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3158, column 8.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3184, column 31.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3261, column 25.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3264, column 20.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3465, column 24.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3466, column 19.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3470, column 19.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3540, column 39.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3541, column 39.  See page 236 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 3542, column 41.  See page 236 of PBP.  (Severity: 3)
Hard tabs used at line 3556, column 106.  See page 20 of PBP.  (Severity: 3)
Expression form of "eval" at line 3796, column 13.  See page 161 of PBP.  (Severity: 5)
Expression form of "eval" at line 4026, column 13.  See page 161 of PBP.  (Severity: 5)
Subroutine "copy_message" with high complexity score (25) at line 4389, column 1.  Consider refactoring.  (Severity: 3)
Too many arguments at line 4389, column 1.  See page 182 of PBP.  (Severity: 3)
Too many arguments at line 4467, column 1.  See page 182 of PBP.  (Severity: 3)
Too many arguments at line 4501, column 1.  See page 182 of PBP.  (Severity: 3)
Too many arguments at line 4690, column 1.  See page 182 of PBP.  (Severity: 3)
Reused variable name in lexical scope: $total_bytes_transferred at line 4751, column 2.  Invent unique variable names.  (Severity: 3)
Reused variable name in lexical scope: $nb_msg_transferred at line 4751, column 2.  Invent unique variable names.  (Severity: 3)
Reused variable name in lexical scope: $nb_msg_transferred at line 4764, column 9.  Invent unique variable names.  (Severity: 3)
Reused variable name in lexical scope: $maxmessagespersecond at line 4764, column 9.  Invent unique variable names.  (Severity: 3)
Reused variable name in lexical scope: $total_bytes_transferred at line 4785, column 9.  Invent unique variable names.  (Severity: 3)
Reused variable name in lexical scope: $maxbytespersecond at line 4785, column 9.  Invent unique variable names.  (Severity: 3)
Expression form of "eval" at line 5972, column 13.  See page 161 of PBP.  (Severity: 5)
Regular expression without "/x" flag at line 6207, column 22.  See page 236 of PBP.  (Severity: 3)
Expression form of "eval" at line 6212, column 13.  See page 161 of PBP.  (Severity: 5)
Too many arguments at line 6376, column 1.  See page 182 of PBP.  (Severity: 3)
Backtick operator used at line 6543, column 4.  Use IPC::Open3 instead.  (Severity: 3)
Backtick operator used at line 6750, column 12.  Use IPC::Open3 instead.  (Severity: 3)
Backtick operator used at line 6770, column 11.  Use IPC::Open3 instead.  (Severity: 3)
Split long regexps into smaller qr// chunks at line 6932, column 12.  See page 261 of PBP.  (Severity: 3)
Split long regexps into smaller qr// chunks at line 6958, column 12.  See page 261 of PBP.  (Severity: 3)
Split long regexps into smaller qr// chunks at line 6999, column 12.  See page 261 of PBP.  (Severity: 3)
Split long regexps into smaller qr// chunks at line 7011, column 12.  See page 261 of PBP.  (Severity: 3)
Expression form of "eval" at line 7117, column 43.  See page 161 of PBP.  (Severity: 5)
Expression form of "eval" at line 7121, column 45.  See page 161 of PBP.  (Severity: 5)
Split long regexps into smaller qr// chunks at line 7326, column 20.  See page 261 of PBP.  (Severity: 3)
Regular expression without "/x" flag at line 7493, column 19.  See page 236 of PBP.  (Severity: 3)
Close filehandles as soon as possible after opening them at line 7537, column 2.  See page 209 of PBP.  (Severity: 4)
Magic variable "*STDERR" should be assigned as "local" at line 7540, column 10.  See pages 81,82 of PBP.  (Severity: 4)
One-argument "select" used at line 7541, column 2.  See page 224 of PBP.  (Severity: 4)