Sure, you have a couple of choices, 
- remove spamdyke
- add
RDNS exclusions for all the IPs your clients use


Because
587 hasn't come to full acceptance YET, client applications like Outlook
lack the wizard settings to flip this easily.  There are several
sites that show how to make these changes, in fact, I made one myself for
my customers.  I have over 50 domains and an average of 30 users per
domain.  Yes, it's a painful pill to have to swallow but in a lot of
cases you won't have any choice.  It's better to get it over with
now.  I have also run into a few broadband providers that block port
25 all together (Comcast & RCN)!  They only allow you to use 25
to their server or you use 587.  This is a huge boost for spam
prevention because it keeps the low lifes of the world from putting up a
spam server.






> Hiii,
>

> But i think thats not the only solution. What if i am an ISP???
Should i
> tell all my customers not to use port 25??? I have 5
virtual domains and
> nearly 500 employees and i cannot guide
daily every that please do not use
> port 25 instead use 587. most
of the users just know how to send recieve
> and read write emails
they dont understand how to change setting etc. So
> practically
sometimes it becomes very difficult to teach them on the
>
phone.
> 
> Regards,
> 
> Anil Aliyan
>   ----- Original Message -----
>  
From: Phil
Leinhauser
>   To: [email protected]
>  
Sent: Wednesday, May 06, 2009 5:37 PM
>   Subject: Re:
[qmailtoaster] SpamDyke Issue
> 
> 
>   Are your
users using port 587 and SMTP auth for submitting their mail? 
> I
believe all the checks are bypassed when mail comes in that port.  587
> has been gaining favor in the past several years as the standard
> submission port for clients instead of 25.
> 
>  
Phil
> 
>   > Dear Jakes,
>   >
>  
> This is regarding SpamDyke. I have installed SpamDyke 3-4 days
back
> only.
>   > Before that i was not using it. But
since the installation most of my
>   > roaming users and
remote offices who are using different isp broadband
>   >
connection are unable to send mails as spamdyke deny to accept mails
> from
>   > them due to no RDNS.
>   >
>   > It is understandable if spamdyke refuses connections from
mail servers
> who
>   > does'nt point to any RDNS but
I just dont understand why does it
> refuses
>   >
my
>   > authentic/genuine local users who are using my
mailserver. Why does
>   > spamdyke
>   > checks
RDNS for clients who are using other ISPs internet
>
connections???
>   >
>   > Is there anyway to tell
spamdyke not to check RDNS for client ip
>   > addresses.
>   > Some of my roaming users use Data Cards and everytime they
connect
>   > internet
>   > using data card a
different ip address is assigned to the laptop so i
>   >
cannot
>   > keep track of each and every address and allow
them in the spamdyke
>   > whiletlists.
>   >
>   > Or i should not use spamdyke at all.
>   >
>   > Regards,
>   >
>   > Anil Aliyan
>   >
>   >
>   >
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