ISPConfig 3 mail server SPAM question
I have a working configuration of ISPConfig 3.0.16 with mail server and website/virtual domain handling.
All my domains are FQDN and the server send and received mails using webmail as well as IMAP/SMTP mail clients.
My users have reported that their email is detected as spam to many of their recipients.
The question is: How to make my server legit and known as NOT spam for every spam detection engine/website out there?
Do I have to complete any kind of forms or subscribe to a specific organisation?
1) Make sure that your server is run on a static IP address.
2) Check if your server is blacklisted: http://www.mxtoolbox.com/
3) Create SPF Records for your domains in DNS.
4) Make sure that the IP address of your server has a correct reverse dns record.
is an example for records to be created in ISPConfig
You can use this wizard to get an idea how your SPF record should look: http://old.openspf.org/wizard.html
A general purpose one is
Record Type: TXT
Data: v=spf1 a mx -all
added "a" : A records specify senders (without this some services, like yahoo, will automatically put you in spam).
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