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Old 12th January 2009
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Carpetsmoker Carpetsmoker is offline
Real Name: Martin
Tcpdump Spy
 
Join Date: Apr 2008
Location: Indonesia
Posts: 2,236
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The maximum login name seems to be defined in sys/param.h (MAXLOGNAME) and utmp.h.

It should be possible to increase this and recompile, but it doesn't seem to be recommended, see:
adduser(8) (RESTRICTIONS section)
http://markmail.org/message/nzaqc2zab5dvttol

As suggested in the above link, you can use mail aliases for mail adresses with >16 characters
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