May this be the problem that [RST,ACK] sent from .212 to .213? Best regards, > > > Christopher Wilson wrote: >> Cutting out the rest of the data- This is where the connection is >> being closed: >> >> 278 45.011168 148.244.85.213 148.244.85.212 TCP >> smtp > 1342 [FIN, ACK] Seq=88 Ack=1 Win=62780 Len=0 >> >> The initial FIN is being sent by the SMTP server. Maybe there's a >> client IP address restriction in the MTA on 85.213 that didn't get >> changed? >> >> -CW >> >> Jesus Alonso Rivas y Rivas wrote: >>>> 278 45.011168 148.244.85.213 148.244.85.212 >>>> TCP smtp > 1342 [FIN, ACK] Seq=88 Ack=1 Win=62780 Len=0 >>>> >> > >