subhasis.stpl wrote:Dec 8 13:47:59 mx postfix/smtpd[5152]: warning: network_biopair_interop: error reading 5 bytes from the network: Connection reset by peer
Looks like a network gateway issue. Search "network_biopair_interop" in Google please.
Also, please make sure you have correct A/MX records in DNS for your mail domain.
Thanks Jhang for your reply.
I got this reply from Gmail.
Mail Delivery Subsystem <mailer-daemon@googlemail.com> 8:03 PM (1 hour ago) to me
This is an automatically generated Delivery Status Notification
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
Delivery to the following recipient has been delayed:
subhasis.bhattacharyya@semaphoreindia.com
Message will be retried for 2 more day(s)
Technical details of temporary failure:
Unspecified Error (SENT_SECOND_EHLO): Connection reset by peer
? Why SENT_SECOND_EHLO message given.
I can Telnet to mx.semaphoreindia.com at Port 25 from Outside of my network.
C:\>telnet mx.semaphoreindia.com 25
220 mx.semaphoreindia.com ESMTP Service ready
ehlo semaphoreindia.com
250-Requested mail action okay, completed
250-SIZE 31457280
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH PLAIN LOGIN
250-8BITMIME
250-STARTTLS
250 OK
Also Traceroute mx.semaphoreindia.com
C:\>tracert mx.semaphoreindia.com
Tracing route to mx.semaphoreindia.com [27.49.39.197]
over a maximum of 30 hops:
1 54 ms 44 ms 38 ms 10.228.193.9
2 49 ms 41 ms 35 ms 10.228.213.14
3 48 ms 39 ms 38 ms 116.202.227.21
4 49 ms 45 ms 35 ms 14.140.119.181.static-Kolkata.vsnl.net.in [14.10.119.181]
5 82 ms 72 ms 72 ms 172.29.250.34
6 93 ms 76 ms 74 ms 59.163.25.242.static.vsnl.net.in [59.163.25.242]
7 86 ms 81 ms 74 ms 115.248.111.22
8 120 ms 104 ms 107 ms 115.249.9.1
9 109 ms 112 ms 105 ms 115.249.9.1
10 122 ms 103 ms 107 ms 27.49.39.11
11 125 ms 103 ms 107 ms mx.semaphoreindia.com [27.49.39.197]
Trace complete.
The DNS query shows the MX record Ok.
C:\>nslookup
Default Server: UnKnown
Address: 10.228.193.113
> set type=MX
> semaphoreindia.com
Server: UnKnown
Address: 10.228.193.113
Non-authoritative answer:
semaphoreindia.com MX preference = 10, mail exchanger = mx.semaphoreindia.com
semaphoreindia.com nameserver = pdns.semaphoreindia.com
mx.semaphoreindia.com internet address = 27.49.39.197
pdns.semaphoreindia.com internet address = 27.49.39.195
>
>
A probe for the Domain semaphoreindia.com at www.dnsstuff.com showed the following report:
All connections to Mailservers port 25 have failed. The standard port for SMTP transactions is 25, so your servers should be operating on that port. It is recommended that it be fixed in order for your mail service to operate properly. The Mail Servers that failed are:
27.49.39.197 | failed message send with: failed cx open with: failed socket connect with: Operation now in progress
The whole situation is very confusing. Zhang can you suggest a solution.