[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] e class  E configuration command  e delivery agent flag  E delivery agent flag  E line (qf file)  E= delivery agent equate  EBCDIC  EDNSBL_TO, enhdnsbl feature  EF_DELETE_BCC flag  EF_HAS8BIT flag  EF_RESPONSE flag  EF_WARNING flag  EGD compile-time macro  EHLO command (SMTP)  2nd  EightBitMode encoding  2nd  electronic mail/email  [See mail messages] empty email addresses  encoding  2nd  3rd  4th  Encrypted: header line  end-of-line string  enhdnsbl feature  2nd  ENHSCLEN compile-time macro  envelope  2nd      DSN ENVID identifier  2nd      logging sender of      masquerading      original DSN      rewriting address of      specifying recipient's address      UDB rewrite on  2nd  environment and -E Build switch  environment variables  2nd  3rd  equates delivery agent  ERRLIST_PREDEFINED compile-time macro  error delivery agent      $: part used with  error messages      illegal command-line switches and      m4 preprocessor and      recipient address for      xf (transcript) file  ERROR:D.S.N:XYZ text (access database)  ERROR:XYZ text  ErrorMode option  errors  [See also exit values, sendmail]     delivery failure count      requeuing in response to      temporary  Errors-To: header line  escape characters  ESMTP (Extended SMTP)  2nd      ESMTP BODY parameter and  2nd      F=2 delivery agent flag and  esmtp delivery agent  ETRN command (SMTP)      F=% delivery agent flag and      rejecting  EX_CANTCREAT value  EX_CONFIG value  EX_IOERR value  EX_OK value  EX_OSERR value  EX_OSFILE value  EX_SOFTWARE value  EX_TEMPFAIL value  EX_UNAVAILABLE value  EX_USAGE value  exclamation line (!)  exit signal  2nd  expensive delivery agents  exploder mailing lists  EXPN command (SMTP)  2nd  3rd  EXPOSED_USER mc macro  Extended SMTP (ESMTP)  external databases  [See databases]