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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]