Sending email to yahoo.com getting delayed and never show up!

[mmarcuse]

I run a business from my domain here that requires timely and accurate delivery to Yahoo.com email addresses. When I send to any yahoo.com email, I get the following message back about 1-2 days later -

Delay reason: SMTP error from remote mail server
after initial connection:
host e.mx.mail.yahoo.com [216.39.53.1]: 421 Message from
(72.35.81.112) temporarily deferred

The message never shows up. I've contacted Yahoo, but they're useless and don't respond. HostPC claims it's Yahoo (and I tend to agree). I'm on servers NS94a and b. I have a different domain on NS1 and 2, and those emails are delivered immediately. Does anyone else have this issue? Would moving my domain from NS94a to a different server possibly help the problem?

[tonydi]

How much mail are you sending to Yahoo users in a day? What sort of email is it?

Google for: smtp 421 message yahoo

Look through the first dozen or so links and you'll see a couple of reasons for this, primary being that Yahoo thinks you're a spammer or people on Yahoo have complained.

[starfighter]

I run a business from my domain here that requires timely and accurate delivery to Yahoo.com email addresses. When I send to any yahoo.com email, I get the following message back about 1-2 days later -

Delay reason: SMTP error from remote mail server
after initial connection:
host e.mx.mail.yahoo.com [216.39.53.1]: 421 Message from
(72.35.81.112) temporarily deferred

The message never shows up. I've contacted Yahoo, but they're useless and don't respond. HostPC claims it's Yahoo (and I tend to agree). I'm on servers NS94a and b. I have a different domain on NS1 and 2, and those emails are delivered immediately. Does anyone else have this issue? Would moving my domain from NS94a to a different server possibly help the problem?
Ah the wonderful yahoo.com. There such a peach to deal with. You could certainly try moving, but there is no guarantee that the server your moving to won't have the same issue. Wish I could tell you I had a magic bullet that would solve the issue. Unfortunately I don't.

[mmarcuse]

I'm talking about single, individual mails. No spamming. Do they think the spam is coming from my domain, or my server IP? If it's the server IP then moving would potentially help.

It's pretty critical to get this fixed. If anyone else has any ideas, I'd be highly appreciative.

[starfighter]

I'm talking about single, individual mails. No spamming. Do they think the spam is coming from my domain, or my server IP? If it's the server IP then moving would potentially help.

It's pretty critical to get this fixed. If anyone else has any ideas, I'd be highly appreciative.
Usually the blocks are ip based, and yahoo does appear to block by ip.

[MrK]

I think HostPC offers static IPs as an addon. That might be a better option than trying to move servers if Yahoo is blocking based on IP.

But, that makes me wonder... If Yahoo is blocking email from you because someone else on the server is spamming, wouldn't that other user be violating the HostPC TOS?

[starfighter]

I think HostPC offers static IPs as an addon. That might be a better option than trying to move servers if Yahoo is blocking based on IP.

But, that makes me wonder... If Yahoo is blocking email from you because someone else on the server is spamming, wouldn't that other user be violating the HostPC TOS?
The spammer would be in violation of our TOS/AUP. But from what I know of things, yahoo just throws the block onto the ip and never makes a spam complaint to us. So there isn't any way for us to tell why there blocking. Then when we ask them to send us the spam reports, then refuse to answer us, or allow us to try and get the block removed. Makes it kinda hard for us to figure out why the block is there in the first place.

[alange]

I can confirm this as well. When my outgoing mail is smarthosted through www519, yahoo and btinternet mail is intermittent.
If I change the smarthost over to verizon (>spit<), the mail goes through.

I'm just starting to get delay messages back to me from www519:

host f.mx.mail.yahoo.com [68.142.202.247]: 421 Message from
(208.115.37.132) temporarily deferred - 4.16.50. Please refer to
http://help.yahoo.com/help/us/mail/defer/defer-06.html

Delay reason: SMTP error from remote mail server after end of data:
host b.mx.mail.yahoo.com [66.196.97.250]: 451 Message temporarily
deferred - [70]

So it looks like Yahoo doesn't like hostpc anymore. :(