[CentOS] Message size rejected

> anne at localhost
>  SMTP error: 552 5.3.4 Message size exceeds fixed limit
> Reporting-MTA: dns; borg2.lydgate.lan
>
> I presume that this is a configurable limit, but I'm not sure where to look.
> Since it says MTA I'm thinking that it's probably postfix.  Can someone
> please tell me what parameter I'm looking for?  Thanks

If it's postfix, the parameter is message_size_limit -- the default is
10240000 (10MB) if it's not explicitly configured.  This parameter
goes in main.cf.

M