On 4/6/20 10:49 PM, J. Roeleveld wrote:
I am afraid most (if not all) ISPs will reject emails if the reverse
DNS does not match.
My experience has been that there needs to be something for both the
forward and reverse DNS. Hopefully they match each other and — and what
I call — round resolve each other. Ideally, they round resolve /and/
match the SMTP HELO / EHLO name.
I think you can get away with at least the first part. There will
likely be warnings, but they probably won't prevent email delivery in
and of themselves.
Using a dynamic range is another "spam" indicator and will also get
your emails blocked by (nearly) all ISPs.
Yep.
If it's not blatant blocking of believed to be dynamic clients (how is
left up to the reader's imagination), you start to run into additional
filtering that may or may not reject the message.
I would suggest putting your outbound SMTP server on a cheap VM hosted
somewhere else. Or you get an outbound SMTP-service that allows you
to decide on domain name and email addresses.
Unfortunately the spammers have made many such cheap VMs IP net blocks
have bad reputations. I'm starting to see more people blocking the
cheaper VPS providers.
--
Grant. . . .
unix || die
