AOL blocking email

Just tried sending a message to an AOL address, from two different IP
addresses using two different smtp servers: Demon & Zen. Both have failed
with a bounce message from AOL = (RLY:B1)
http://postmaster.info.aol.com/errors/554rlyb1.html

.... which appears to mean that the source IP addresses are temporarily
blocked.

Is this a common problem when sending mail to AOL addresses?

--
Graham J

"Andy Burns" <(E-Mail Removed)> wrote in message
newsaSdnT7iR9aCrkTRnZ2dnUVZ8h-(E-Mail Removed)...
> Graham J wrote:
>
>> ... which appears to mean that the source IP addresses are temporarily
>> blocked.
>>
>> Is this a common problem when sending mail to AOL addresses?
>
> Yes, they're quite picky, does the reverse DNS of your (external) IP
> address resolve to the name your server uses in its HELO, does a forward
> DNS lookup of that name resolve to the IP address?

In both cases the email is sent via the ISP's mail server (post.demon.co.uk
or mailhost.zen.co.uk) So the IP address I'm sending from should not be
relevant. However both these IP addresses resolve to sensible names, and
these names in turn resolve to the correct IP address.

My understanding is that the remote SMTP server's HELO request should get a
response from my ISP's mail server, and my own IP address should not be
relevant

However sending to a different AOL address seems to work ...

--
Graham J

"Andy Burns" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) o.uk...
> Graham J wrote:
>
>> In both cases the email is sent via the ISP's mail server
> [snip]
>> my own IP address should not be relevant
>
> Correct, I thought you were running your own SMTP server, that usually
> causes problems with AOL. What do Demon and/or Zen say?

Not called either yet, 'cos the problem has now gone away !!!!

--
Graham J