ERR - handle_mails - [file src/watch_mail_proxy.c, line 894]: mail is too long
...
ERR - memory allocator - malloc of 133852295258177 bytes failed; OS error 12 (Cannot allocate memory)
The server has probably allocated all available virtual memory. To solve
this problem, make more virtual memory available to your server, or reduce
one or more of the following server configuration settings:
nsslapd-cachesize (Database Settings - Maximum entries in cache)
nsslapd-cachememsize (Database Settings - Memory available for cache)
nsslapd-dbcachesize (LDBM Plug-in Settings - Maximum cache size)
nsslapd-import-cachesize (LDBM Plug-in Settings - Import cache size).
Can't recover; calling exit(1).