Tagged Questions
0
votes
0answers
67 views
The email sent from my server are marked as spam
I have a dedicated server at OVH.
For several days I've noticed I'm in a spam list (spamcannibal).
The reason I said was for generic PTR. I've changed and I have commanded to remove from the list.
...
3
votes
3answers
203 views
With regard to anti-spam practices, what exactly does a typical reverse DNS check look for?
My understanding is that a typical reverse DNS lookup will compare the SMTP hostname (provided in the EHLO/HELO command) of an incoming connection and verify that it matches the PTR record for the ...
0
votes
2answers
173 views
Reverse DNS for mail server [duplicate]
Possible Duplicate:
How does a Reverse DNS lookup work with regards to spam filters?
I have a question about setting a reverse DNS record for my mail server.
Which is the best way to ...
1
vote
3answers
2k views
spam problem related to reverse dns config
I have a client whose ISP recently switched their circuit and static IP to an IP that was already blacklisted for SPAM (nice).
The client is running Windows SBS 2003 with Exchange 2003 and DNS for ...
1
vote
3answers
3k views
Exchange 2007 Delivery Delayed (maybe need certificate?)
Last week, I setup a new domain and Exchange Server 2007 SP1. I created new accounts and mailboxes for my 30 users and imported all mail from their old domain to this new server. It's a Hub Transport ...
0
votes
1answer
141 views
Does RDNS for mail server have to match the mail server hostname exactly?
Typically when setting up a mail server, I create an rDNS record for the mail server IP to match the mail server hostname (ex: mail.example.com).
Can I instead set the rDNS ptr to match the parent ...
0
votes
3answers
75 views
Does “From” field have to have the same domain as the reverse DNS to not be considered spam?
I have 2 applications at the same IP with 2 different domain names. Hourjar uses noreply@hourjar.com for the "From" field when it sends emails, and Nimikri uses noreply@nimikri.com. If my my reverse ...
2
votes
4answers
177 views
Does sending e-mail in the name of customers increase the risk of being marked as spammer?
We are developing a SaaS website application that lets users send invoices to their clients. Ideally, these e-mails should appear to be originating from our customers, so the sender e-mail address ...
5
votes
4answers
5k views
How does a Reverse DNS lookup work with regards to spam filters?
I have heard that most spam filters use a reverse DNS lookup on the originating IP address of the sending SMTP server (or something like that) as part of the verification process. I want to make sure ...
2
votes
4answers
645 views
Is OpenDNS safe to use in a location with Exchange/Reverse DNS
I like OpenDNS, but was wondering if anyone has experience deploying it for a location with an Exchange installation. I'm concerned specifically about whether any filtering they do would cause ...
