SYSERR(root): collect: read timeout on connection from

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Dear All,

some user are unable to send emails using my server , sendmail,


Mar 16 18:40:20 ns3 sendmail[23129]: m2GCenT2023129: SYSERR(root): collect: read timeout on connection from [10.10.10.1], from=<user@domain.net>
Mar 16 18:40:55 ns3 sendmail[23129]: m2GCenT2023129: from=<user@domain.net>, size=0, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=[10.10.10.1]

Mar 16 18:40:30 ns3 sendmail[23129]: m2GCenT2023129: SYSERR(root): collect: read timeout on connection from [10.10.10.1], from=<user@domain.net>
Mar 16 18:40:55 ns3 sendmail[23129]: m2GCenT2023129: from=<user@domain.net>, size=0, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=[10.10.10.1]


Mar 16 18:40:49 ns3 sendmail[23129]: m2GCenT2023129: SYSERR(root): collect: read timeout on connection from [10.10.10.1], from=<user@domain.net>
Mar 16 18:40:55 ns3 sendmail[23129]: m2GCenT2023129: from=<user@domain.net>, size=0, class=0, nrcpts=1, proto=SMTP, daemon=MTA, relay=[10.10.10.1]


Can anyone help in this regard


Regards,
Thanks
Mambo