No mails from yahoo and others

[u.nnorom]

Hello, does anyone have solution to this problem?

When mails from yahoo are sent to zimbra, it gives the following error on /var/log/zimbra.log

Mar 10 18:44:11 emsvr postfix/smtp[8473]: B628C1D60B3F: to=<lsrini03@yahoo.co.in>, relay=none, delay=1806, status=deferred (connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag)
Mar 10 18:44:11 emsvr postfix/smtp[8476]: 97E911D60B3C: to=<lsrini03@yahoo.co.in>, relay=none, delay=1934, status=deferred (connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag)
Mar 10 18:44:14 emsvr postfix/smtp[8470]: 2A7BD1D60B3A: to=<lsrini03@yahoo.co.in>, relay=in32.mxauth.yahoo.com[202.86.5.24], delay=2004, status=sent (250 ok dirdel)
Mar 10 18:44:14 emsvr postfix/qmgr[7557]: 2A7BD1D60B3A: removed
Mar 10 18:44:16 emsvr postfix/smtp[8473]: connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag (port 25)
Mar 10 18:44:16 emsvr postfix/smtp[8473]: 74B231D6042D: to=<lsrini03@yahoo.co.in>, relay=none, delay=1964, status=deferred (connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag)
Mar 10 18:44:16 emsvr postfix/smtp[8470]: connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag (port 25)
Mar 10 18:44:16 emsvr postfix/smtp[8470]: 719E31D60B3B: to=<lsrini03@yahoo.co.in>, relay=none, delay=7354, status=deferred (connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag)
Mar 10 18:44:16 emsvr postfix/smtp[8479]: 138291D60B40: to=<lsrini03@yahoo.co.in>, relay=in32.mxauth.yahoo.com[202.86.5.24], delay=1780, status=sent (250 ok dirdel)
Mar 10 18:44:16 emsvr postfix/qmgr[7557]: 138291D60B40: removed
Mar 10 18:44:16 emsvr postfix/smtp[8468]: 544041D60B41: to=<lsrini03@yahoo.co.in>, relay=in32.mxauth.yahoo.com[202.86.5.24], delay=1699, status=deferred (host in32.mxauth.yahoo.com[202.86.5.24] said: 451 Message temporarily deferred - [] (in reply to end of DATA command))
Mar 10 18:44:18 emsvr postfix/smtp[8476]: connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag (port 25)
Mar 10 18:44:18 emsvr postfix/smtp[8476]: 789E0331804A: to=<lsrini03@yahoo.co.in>, relay=none, delay=7281, status=deferred (connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag)
Mar 10 18:44:18 emsvr postfix/smtp[8468]: connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag (port 25)
Mar 10 18:44:18 emsvr postfix/smtp[8473]: connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag (port 25)
Mar 10 18:44:18 emsvr postfix/smtp[8468]: 079351D60373: to=<lsrini03@yahoo.co.in>, relay=none, delay=1667, status=deferred (connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag)
Mar 10 18:44:18 emsvr postfix/smtp[8473]: 32A343318040: to=<lsrini03@yahoo.co.in>, relay=none, delay=3467, status=deferred (connect to in32.mxauth.yahoo.com[202.86.5.24]: server refused to talk to me: 421 Messag)

Please help out; i am stock right now.

Uzor

[phoenix]

When you get that sort of error from Yahoo mail servers there's usually a link to an errors message page, are there such errors in the log and have you read that page? Have you also checked that your IP is not on any blacklists?

oO you actually mean the Zimbra server? If so, this is in the wrong forum (it's in Zimbra Desktop) so I'll move it for you.

[dwmtractor]

I never looked in my logs, but way back when I remember having a problem with yahoo and gmail rejecting all my messages as spam. Turned out that it had to do with the way I had set up the dmz where my mail server lived. The router that enabled the dmz had a public ip range to use, and of course one of those ip addresses was the public address of the router. I had used a second public IP address as the one for the mail server, and set up DNAT to route incoming mail traffic to my mail server. However, OUTGOING traffic from the mail server was still using the router's main masquerading rule, so that if you looked at headers you'd see that the outgoing messages came from the router's main IP, not the mail server's IP.

This created a problem for anybody who does RDNS lookups to screen for spam. The source IP of the messages was different than the IP in the MX and RDNS records, hence the mail was rejected.

The only way to solve this was to create an SNAT rule on the router so that outgoing traffic from the mail server comes from the public IP address you have published for that server.

Incidentally, this is also necessary if you're going to have successful external authentication for smtp (for users outside your firewall).

Of course, if you aren't in a DNATed DMZ, then I'm barking up the wrong tree. . .

[dfriestedt]

I used to have lots of problems sending to yahoo. make sure RDNS is setup for the mail server and the firewall zimbra lives behind. Have a look at this thread

http://www.zimbra.com/forums/adminis...ils-yahoo.html

My IP was on a yahoo only black list. I ended up relaying through iredmail and DKIM signing all email. That solved the problem but I didn't like this new potential point of failure. So, I moved to a new IP and didn't have a single problem.