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0 pointsmozumder8y ago0 comments

You use it with your home ISP on a static-IP address.

0 comments

Any outgoing mail will almost certainly be spam-blocked if you send from a residential IP. Also, most ISPs block port 25.

mozumderOP8y ago

Nope.

When you ask your ISP for a static-IP address, your service goes from Residential to a more expensive Business account, and they open up outgoing mail ports. (At least for Verizon FIOS that I'm on, pretty sure Comcast is same as well.)

Cloud IP addresses are probably more problematic for spam blocklists.

perlgod8y ago

Glad it works for you. My comcast connection is far too unreliable to ever rely on for email!

Curious though, can you also set your own reverse DNS entry for your static ip? I’ve found many mail servers will reject your mail if rDNS records don’t match up.

zlynx8y ago

I'm also running a server on a Comcast business service with a static IP. My service has been really stable. This must vary on area. Also it seems if you're on business class, the techs take you more seriously. When I did have some stability problems the tech they sent out did a few tests, then went to the entire first floor (5 units) of the condo building with big sticky notes telling them to schedule a service appointment or have their service blocked.

Getting reverse DNS was easy. Following the directions I found via Google I went into the Comcast business service forums, read their pinned posts and sent a PM to the current service guy. He set the reverse DNS for me. It took about a day.

mozumderOP8y ago

I've never had to worry about reverse-DNS, and I email thousands of fashion/media/tech companies around the world, big and small. Are there really servers that block based on reverse-DNS? I've never seen it.

It seems to be a flaw to have reverse-DNS block mail servers, since a single mail server might serve multiple domains. (My server serves email for multiple domains)

j / k navigate · click thread line to collapse

0 comments

perlgod8y ago

Any outgoing mail will almost certainly be spam-blocked if you send from a residential IP. Also, most ISPs block port 25.

mozumderOP8y ago

Nope.

Cloud IP addresses are probably more problematic for spam blocklists.

perlgod8y ago

Glad it works for you. My comcast connection is far too unreliable to ever rely on for email!

Curious though, can you also set your own reverse DNS entry for your static ip? I’ve found many mail servers will reject your mail if rDNS records don’t match up.

zlynx8y ago

mozumderOP8y ago

It seems to be a flaw to have reverse-DNS block mail servers, since a single mail server might serve multiple domains. (My server serves email for multiple domains)

j / k navigate · click thread line to collapse