Would these errors cause email sending issues?

[cgmckeever]

I understand that these errors should be fixed (and they have been) - I
am just trying to learn the magnitude that these errors could cause.
The issue at hand is that many 3rd part ISP's (aol, comcast) are
sending bounce/delay/undeliv messages for _good email accounts_:

Bounce message:

From: MAILER-DAEMON at smtp2.foo.com
Sent: Tue, 24 Jan 2006 13:04:47 -0800
To: foo.user at foo.com

Reporting-MTA: dns; smtp2.foo.com
Arrival-Date: Tue, 24 Jan 2006 08:35:14 -0800

Final-Recipient: RFC822; foo at aol.com
Action: delayed
Status: 4.2.0
Last-Attempt-Date: Tue, 24 Jan 2006 13:04:47 -0800
Will-Retry-Until: Sun, 29 Jan 2006 08:35:14 -0800

DNS Errors:

ERROR: One or more of the nameservers listed at the parent servers are
not listed as NS records at your nameservers. The problem NS records
are:
ns1.foo-dns.net.
ns2.foo-dns.net.

ERROR: Your nameservers disagree as to which version of your DNS is the
latest (2005092923 versus 2005092928). This is OK if you have just made
a change recently, and your secondary DNS servers haven't yet received
the new information from the master. I will continue the report,
assuming that 2005092928 is the correct serial #. The serial numbers
reported by each DNS server are:

Would these cause mail sending issues??

Thanks in advance!