checking CRAN incoming feasibility ... NOTE Maintainer

These checks can be disabled. R Internals states:

_R_CHECK_CRAN_INCOMING_

Check whether package is suitable for publication on CRAN. Default: false, except for CRAN submission checks.

_R_CHECK_CRAN_INCOMING_REMOTE_

Include checks that require remote access among the above. Default: same as _R_CHECK_CRAN_INCOMING_

According to CRAN Maintainer Uwe Ligges,

This is just a note that reminds CRAN maintainers to check that the submission comes actually from his maintainer and not anybody else.

Thus, it is safe to ignore such a message.