hMailserver sent Emails get rejected by recipient's providers
I have an "hMailserver" running.
It has two jobs:
1. receive "local" emails, which are stored on that machine as ".eml" files and are processed by some software
2. relay emails addressing an external address to be sent out to the internet
The concept is basically working fine.
However, I have problems of getting the relayed emails accepted by the recipient's provider.
From Microsoft I get "banned email". From Google I don't get any message, but the email does not arrive.
The machine (running hMailserver) is sending above emails from a machine, which has no certificate.
Is that a possible reason?
Or do I have to configure something in addition?
Many thanks for any help
It has two jobs:
1. receive "local" emails, which are stored on that machine as ".eml" files and are processed by some software
2. relay emails addressing an external address to be sent out to the internet
The concept is basically working fine.
However, I have problems of getting the relayed emails accepted by the recipient's provider.
From Microsoft I get "banned email". From Google I don't get any message, but the email does not arrive.
The machine (running hMailserver) is sending above emails from a machine, which has no certificate.
Is that a possible reason?
Or do I have to configure something in addition?
Many thanks for any help
ASKER
Hi Lee,
Thanks a lot for your very quick checklist.
This is extremely helpful.
I can see already the dynamic vs. Static IPO address issue here.
Will work through the list though.
Thanks a lot for your very quick checklist.
This is extremely helpful.
I can see already the dynamic vs. Static IPO address issue here.
Will work through the list though.
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We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
To fight spam most ISPs/spam filters do a LOT to ensure the message sent is legitimate. Do you have SPF records defined for the domain the message is coming from? Is the mail server's IP listed in the SPF record? Is the IP the mail server uses static or dynamic (most spam filters blacklist dynamic addresses since legitimate businesses should be sending from static addresses). Is the DNS name reverse lookup corresponding to the name provided by the SMTP server during handshake?