On Thu, Dec 23, 2010 at 2:06 PM, mouss <mo...@ml.netoyen.net> wrote: > Le 23/12/2010 19:50, Roman Gelfand a écrit : >> I am encountering trouble sending outbound email (connection time >> outs). Is there a way I could see mail header contents without >> connecting to the target server to send out the email? >> > > try a sniffer (tcpdump, wireshark, ...) > > > - if you have timeout with every remote server, then you have a borked > box (known bugs: tcp windows scaling, delayed ack, ... etc.) or a borked > firewall setup (common silly setup: block all icmp).
Actually, this is what I am experiencing. However, behind the same firewall I have exchange 2007 server and have no problems sending out email to the same recipients. Both postfix and exchange servers have the same firewall policies. All outgoing traffic. BTW... the originating server is exchange even now. Only now, I use postfix as smart host. Also, I have been using the same postfix server as incoming mail gateway for couple of years. Works great. Thanks > > - if you have timeout with few remote detinations, then they might be > blocking you, rate-limiting you, foobaring you. you can try sending them > mail from gmail (for example) and see. >
