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iis smtp nntp : Mail is never delivered instantly to yahoo.com
We have a smtp server (win2003/IIS) in DMZ (Nat'ed using a public IP) which accepts all emails from the Internet for our domain for example xyz.com and delivers all that email to our exchange 2003 server (inside network). All is well here. Outgoing Emails setup: Exchange 2003 forwards all outgoing emails to the same SMTP server in DMZ, which delivers mail to all Internet sites. Problem: Emails written to ANY domain is delivered instantly. For example mails to gmail.com, hotmail.com, anything.com is delivered instantly. But if the to/cc/bcc address contains a yahoo.com address, bingo, that email just sits there in queue directory. Things that happen: The mail gets delivered at yahoo.com either after 20 mins, sometimes it takes more than an hour. Sometimes it simply does not get delivered. If I restart the SMTP service, the mail DOES get delivered. Server in DMZ is allowed all outgoing TCP/UDP connections. So there is no issue with any firewall setting too. Queue directory always has some or the other junk mail sitting there, as usual containing emails to be delivered to phony addresses. But this directory is auto cleaned by smtp server, i guess by smtp service. Can someone help please? Our users have customers who have yahoo.com addresses and this is causing a lot of pain. Thanks Dilip
This is not authorative... But...
I've seen similar problems with Yahoo emails in teh past as well. It seems to take (sometimes) hours to get an email through to them, and sometimes it never happens. It is a Yahoo problem, not your problem and not mine, and not some others who have seen the same thing happen. What is happeing is that for some reason Yahoo is not accepting the email on the first try. It (the email) goes back into the queue for later delivery. There is a schedule for retries that progressively lengthens the delay between retries with each failure, until a given time has passed (this can be configured!) and once the total limit passes, the email is supposed to bounc back to the user. I found that if I shortened the length of time between retries substantially that most Yahoo mails go through on the second or third try. I suspect it is their server being overloaded, but can't say for sure. On Sun, 27 Mar 2005 05:51:02 -0800, "Dilip" [quoted text, click to view] <Dilip@discussions.microsoft.com> wrote: >Incoming Emails setup: >We have a smtp server (win2003/IIS) in DMZ (Nat'ed using a public IP) which >accepts all emails from the Internet for our domain for example xyz.com and >delivers all that email to our exchange 2003 server (inside network). All is >well here. > >Outgoing Emails setup: >Exchange 2003 forwards all outgoing emails to the same SMTP server in DMZ, >which delivers mail to all Internet sites. > >Problem: >Emails written to ANY domain is delivered instantly. >For example mails to gmail.com, hotmail.com, anything.com is delivered >instantly. >But if the to/cc/bcc address contains a yahoo.com address, bingo, that email >just sits there in queue directory. > >Things that happen: >The mail gets delivered at yahoo.com either after 20 mins, sometimes it >takes more than an hour. Sometimes it simply does not get delivered. If I >restart the SMTP service, the mail DOES get delivered. > >Server in DMZ is allowed all outgoing TCP/UDP connections. So there is no >issue with any firewall setting too. Queue directory always has some or the >other junk mail sitting there, as usual containing emails to be delivered to >phony addresses. But this directory is auto cleaned by smtp server, i guess >by smtp service. > >Can someone help please? Our users have customers who have yahoo.com >addresses and this is causing a lot of pain. > >Thanks >Dilip PeterD, the Darkstar Network To email, fix my address!
Thanks Peter and Jeff for the reply.
But do you have any suggestions, like a configuration change or some customised tool that you may know. Retry settings seems to be the first thing that I should tweak. Meanwhile I am going to speak with someone at Yahoo! tomorrow morning. I hope that I am able to speak with someone from Yahoo! I have heard that their support is real bad. [quoted text, click to view] "Dilip" wrote:
> Incoming Emails setup: > We have a smtp server (win2003/IIS) in DMZ (Nat'ed using a public IP) which > accepts all emails from the Internet for our domain for example xyz.com and > delivers all that email to our exchange 2003 server (inside network). All is > well here. > > Outgoing Emails setup: > Exchange 2003 forwards all outgoing emails to the same SMTP server in DMZ, > which delivers mail to all Internet sites. > > Problem: > Emails written to ANY domain is delivered instantly. > For example mails to gmail.com, hotmail.com, anything.com is delivered > instantly. > But if the to/cc/bcc address contains a yahoo.com address, bingo, that email > just sits there in queue directory. > > Things that happen: > The mail gets delivered at yahoo.com either after 20 mins, sometimes it > takes more than an hour. Sometimes it simply does not get delivered. If I > restart the SMTP service, the mail DOES get delivered. > > Server in DMZ is allowed all outgoing TCP/UDP connections. So there is no > issue with any firewall setting too. Queue directory always has some or the > other junk mail sitting there, as usual containing emails to be delivered to > phony addresses. But this directory is auto cleaned by smtp server, i guess > by smtp service. > > Can someone help please? Our users have customers who have yahoo.com > addresses and this is causing a lot of pain. > > Thanks > Dilip
On Sun, 27 Mar 2005 05:51:02 -0800, "Dilip"
[quoted text, click to view] <Dilip@discussions.microsoft.com> wrote: >Incoming Emails setup: >We have a smtp server (win2003/IIS) in DMZ (Nat'ed using a public IP) which >accepts all emails from the Internet for our domain for example xyz.com and >delivers all that email to our exchange 2003 server (inside network). All is >well here. > >Outgoing Emails setup: >Exchange 2003 forwards all outgoing emails to the same SMTP server in DMZ, >which delivers mail to all Internet sites. > >Problem: >Emails written to ANY domain is delivered instantly. >For example mails to gmail.com, hotmail.com, anything.com is delivered >instantly. >But if the to/cc/bcc address contains a yahoo.com address, bingo, that email >just sits there in queue directory. > >Things that happen: >The mail gets delivered at yahoo.com either after 20 mins, sometimes it >takes more than an hour. Sometimes it simply does not get delivered. If I >restart the SMTP service, the mail DOES get delivered. > >Server in DMZ is allowed all outgoing TCP/UDP connections. So there is no >issue with any firewall setting too. Queue directory always has some or the >other junk mail sitting there, as usual containing emails to be delivered to >phony addresses. But this directory is auto cleaned by smtp server, i guess >by smtp service. > >Can someone help please? Our users have customers who have yahoo.com >addresses and this is causing a lot of pain. FWIW, I see the same behavior on non-Microsoft SMTP servers as well. Yahoo just doesn't make the connection on about half the attempts. Miss two or three attempts and the retries start taking hours.
Thanks for the reply.
I will fix the retry settings. I will update soon.... [quoted text, click to view] "Peter D. Hipson" wrote:
> No one at Yahoo who knows anythign at all will speak to you! <g> They > are too busy fixing the email system... The customer support person > will tell you everythign is OK, it is your problem. Stock answer. > > Fix: Yes, I reduced the retry time out period substantiallly. This > made for more retries in a shorter period of time. Eventually the > email will go through, not usually the first time. > > BTW, both receiving and sending at Yahoo are "broken", my agent uses > Yahoo and sometimes his emails to me are four or more hours old. > > On Sun, 27 Mar 2005 17:41:03 -0800, "Dilip" > <Dilip@discussions.microsoft.com> wrote: > > >Thanks Peter and Jeff for the reply. > >But do you have any suggestions, like a configuration change or some > >customised tool that you may know. Retry settings seems to be the first thing > >that I should tweak. > > > >Meanwhile I am going to speak with someone at Yahoo! tomorrow morning. > >I hope that I am able to speak with someone from Yahoo! > >I have heard that their support is real bad. > > > > PeterD, the Darkstar Network > To email, fix my address! > ExpertZone!
I agree with you Jeff.
But users are users, they just panic. They will always think that the local network is always the issue. It will take sometime for me to convince users that hey "We are not the problem here". etc. Anyways I changed the retry settings and now Yahoo! emails are getting delivered. After 5 minutes.... but... thats just fine for me as of now. Thanks a lot you guys to help me out. Considering this as a closed issue for now. Cheers! Dilip [quoted text, click to view] "Jeff Cochran" wrote:
> On Mon, 28 Mar 2005 09:27:45 -0500, Peter D. Hipson <mcn01 at hipson > dot net> wrote: > > >No one at Yahoo who knows anythign at all will speak to you! <g> They > >are too busy fixing the email system... The customer support person > >will tell you everythign is OK, it is your problem. Stock answer. > > > >Fix: Yes, I reduced the retry time out period substantiallly. This > >made for more retries in a shorter period of time. Eventually the > >email will go through, not usually the first time. > > > >BTW, both receiving and sending at Yahoo are "broken", my agent uses > >Yahoo and sometimes his emails to me are four or more hours old. > > Welcome to the world of email. :) > > Personally, my system works properly so I refuse to adapt it to > outside systems that don't. Mail is late for Yahoo users. We just > tell people not to use a Yahoo account, or if they do, to expect mail > delivery to take longer. > > Jeff > > > > >On Sun, 27 Mar 2005 17:41:03 -0800, "Dilip" > ><Dilip@discussions.microsoft.com> wrote: > > > >>Thanks Peter and Jeff for the reply. > >>But do you have any suggestions, like a configuration change or some > >>customised tool that you may know. Retry settings seems to be the first thing > >>that I should tweak. > >> > >>Meanwhile I am going to speak with someone at Yahoo! tomorrow morning. > >>I hope that I am able to speak with someone from Yahoo! > >>I have heard that their support is real bad. > >> > > > >PeterD, the Darkstar Network > >To email, fix my address! > >ExpertZone! >
No one at Yahoo who knows anythign at all will speak to you! <g> They
are too busy fixing the email system... The customer support person will tell you everythign is OK, it is your problem. Stock answer. Fix: Yes, I reduced the retry time out period substantiallly. This made for more retries in a shorter period of time. Eventually the email will go through, not usually the first time. BTW, both receiving and sending at Yahoo are "broken", my agent uses Yahoo and sometimes his emails to me are four or more hours old. On Sun, 27 Mar 2005 17:41:03 -0800, "Dilip" [quoted text, click to view] <Dilip@discussions.microsoft.com> wrote: >Thanks Peter and Jeff for the reply. >But do you have any suggestions, like a configuration change or some >customised tool that you may know. Retry settings seems to be the first thing >that I should tweak. > >Meanwhile I am going to speak with someone at Yahoo! tomorrow morning. >I hope that I am able to speak with someone from Yahoo! >I have heard that their support is real bad. > PeterD, the Darkstar Network To email, fix my address!
On Mon, 28 Mar 2005 09:27:45 -0500, Peter D. Hipson <mcn01 at hipson
[quoted text, click to view] dot net> wrote: >No one at Yahoo who knows anythign at all will speak to you! <g> They >are too busy fixing the email system... The customer support person >will tell you everythign is OK, it is your problem. Stock answer. > >Fix: Yes, I reduced the retry time out period substantiallly. This >made for more retries in a shorter period of time. Eventually the >email will go through, not usually the first time. > >BTW, both receiving and sending at Yahoo are "broken", my agent uses >Yahoo and sometimes his emails to me are four or more hours old. Welcome to the world of email. :) Personally, my system works properly so I refuse to adapt it to outside systems that don't. Mail is late for Yahoo users. We just tell people not to use a Yahoo account, or if they do, to expect mail delivery to take longer. Jeff [quoted text, click to view] >
>On Sun, 27 Mar 2005 17:41:03 -0800, "Dilip" ><Dilip@discussions.microsoft.com> wrote: > >>Thanks Peter and Jeff for the reply. >>But do you have any suggestions, like a configuration change or some >>customised tool that you may know. Retry settings seems to be the first thing >>that I should tweak. >> >>Meanwhile I am going to speak with someone at Yahoo! tomorrow morning. >>I hope that I am able to speak with someone from Yahoo! >>I have heard that their support is real bad. >> > >PeterD, the Darkstar Network >To email, fix my address! >ExpertZone!
This is reply I received from YAHOO.
Is there any way I can provide them detailed logs on an SMTP conversation from my IIS SMTP service to their YAHOO ysmtp service? Hello, Thank you for contacting Yahoo! Customer Care. Without any specific SMTP error message, we are unable to effectively troubleshoot the issue. Occasionally, interruptions or disruptions in email transmissions over the Internet will render a message undeliverable. While this is very rare, it does happen. If you continue to experience this delivery issue, in order to troubleshoot it, we would appreciate it if you could provide a full SMTP thread that represents the connection that resulted in the delivery failure. Please provide: * The output of a manual SMTP test (typically with telnet) from your mail server to our servers showing the SMTP conversation leading up to and including the rejection message. * Log messages from your mail server showing which IP you connected to and what responses you got from the remote server at the time you received the failures. Again, we appreciate your assistance and apologize for any inconvenience. Thank you again for contacting Yahoo! Customer Care. Regards, Sergio Yahoo! Customer Care - Mail Investigations [quoted text, click to view] "Jeff Cochran" wrote:
> On Mon, 28 Mar 2005 09:27:45 -0500, Peter D. Hipson <mcn01 at hipson > dot net> wrote: > > >No one at Yahoo who knows anythign at all will speak to you! <g> They > >are too busy fixing the email system... The customer support person > >will tell you everythign is OK, it is your problem. Stock answer. > > > >Fix: Yes, I reduced the retry time out period substantiallly. This > >made for more retries in a shorter period of time. Eventually the > >email will go through, not usually the first time. > > > >BTW, both receiving and sending at Yahoo are "broken", my agent uses > >Yahoo and sometimes his emails to me are four or more hours old. > > Welcome to the world of email. :) > > Personally, my system works properly so I refuse to adapt it to > outside systems that don't. Mail is late for Yahoo users. We just > tell people not to use a Yahoo account, or if they do, to expect mail > delivery to take longer. > > Jeff > > > > >On Sun, 27 Mar 2005 17:41:03 -0800, "Dilip" > ><Dilip@discussions.microsoft.com> wrote: > > > >>Thanks Peter and Jeff for the reply. > >>But do you have any suggestions, like a configuration change or some > >>customised tool that you may know. Retry settings seems to be the first thing > >>that I should tweak. > >> > >>Meanwhile I am going to speak with someone at Yahoo! tomorrow morning. > >>I hope that I am able to speak with someone from Yahoo! > >>I have heard that their support is real bad. > >> > > > >PeterD, the Darkstar Network > >To email, fix my address! > >ExpertZone! >
I guess so. But atleast now, after changing the retry settings to 5, 15, 30,
60, 60, the emails DO get delivered. I am happy. Now I surely want to say one thing - Yahoo! sucks! They should remove that exclamation mark from their trademark. Really. Anyways thanks to you all for giving me the right help. Bye [quoted text, click to view] "Phillip Vong" wrote:
> They might be using some form of Greylisting. We're using Greylisting here > so my server will always send an email back to say try later if I don't know > you. > > Phil > > "Dilip" <Dilip@discussions.microsoft.com> wrote in message > news:0A9E5824-D203-482F-9C89-53554292BB32@microsoft.com... > > Incoming Emails setup: > > We have a smtp server (win2003/IIS) in DMZ (Nat'ed using a public IP) > > which > > accepts all emails from the Internet for our domain for example xyz.com > > and > > delivers all that email to our exchange 2003 server (inside network). All > > is > > well here. > > > > Outgoing Emails setup: > > Exchange 2003 forwards all outgoing emails to the same SMTP server in DMZ, > > which delivers mail to all Internet sites. > > > > Problem: > > Emails written to ANY domain is delivered instantly. > > For example mails to gmail.com, hotmail.com, anything.com is delivered > > instantly. > > But if the to/cc/bcc address contains a yahoo.com address, bingo, that > > just sits there in queue directory. > > > > Things that happen: > > The mail gets delivered at yahoo.com either after 20 mins, sometimes it > > takes more than an hour. Sometimes it simply does not get delivered. If I > > restart the SMTP service, the mail DOES get delivered. > > > > Server in DMZ is allowed all outgoing TCP/UDP connections. So there is no > > issue with any firewall setting too. Queue directory always has some or > > the > > other junk mail sitting there, as usual containing emails to be delivered > > to > > phony addresses. But this directory is auto cleaned by smtp server, i > > guess > > by smtp service. > > > > Can someone help please? Our users have customers who have yahoo.com > > addresses and this is causing a lot of pain. > > > > Thanks > > Dilip > > > >
They might be using some form of Greylisting. We're using Greylisting here
so my server will always send an email back to say try later if I don't know you. Phil [quoted text, click to view] "Dilip" <Dilip@discussions.microsoft.com> wrote in message news:0A9E5824-D203-482F-9C89-53554292BB32@microsoft.com... > Incoming Emails setup: > We have a smtp server (win2003/IIS) in DMZ (Nat'ed using a public IP) > which > accepts all emails from the Internet for our domain for example xyz.com > and > delivers all that email to our exchange 2003 server (inside network). All > is > well here. > > Outgoing Emails setup: > Exchange 2003 forwards all outgoing emails to the same SMTP server in DMZ, > which delivers mail to all Internet sites. > > Problem: > Emails written to ANY domain is delivered instantly. > For example mails to gmail.com, hotmail.com, anything.com is delivered > instantly. > But if the to/cc/bcc address contains a yahoo.com address, bingo, that > just sits there in queue directory. > > Things that happen: > The mail gets delivered at yahoo.com either after 20 mins, sometimes it > takes more than an hour. Sometimes it simply does not get delivered. If I > restart the SMTP service, the mail DOES get delivered. > > Server in DMZ is allowed all outgoing TCP/UDP connections. So there is no > issue with any firewall setting too. Queue directory always has some or > the > other junk mail sitting there, as usual containing emails to be delivered > to > phony addresses. But this directory is auto cleaned by smtp server, i > guess > by smtp service. > > Can someone help please? Our users have customers who have yahoo.com > addresses and this is causing a lot of pain. > > Thanks > Dilip >
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