The best replacement for bcc is cc.

The best alternatives to bcc are rated as following:
★★★★★  cc
★★★★  bci
★★★  cc email
★★★  fcc
★★★  ccc
★★  scc
★★  bc
★★  cc difference
★  bmcc
★  famu
★  to
★  whitman
★  cc hidden
★  vma
★  ldpc
★  blind carbon copy
  cc email etiquette
  undisclosed recipients
  cc in email
  trichoepithelioma
  bcc
  fcc stronger
  not to bcc
  scsu
  cc on email
  hide bcc
  cc etiquette
  bci boa

Your alternative for bcc is not listed? Suggest!
Speaking about bcc, one probably shouldn't forget about php mail.

Other search terms related to bcc and their ratings are:
★★★★★ php mail
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Google Trends

Scale is based on the average worldwide traffic of bcc in all years. Click on graph for more.
bcc
cc
bci