Browsing Tag
allo asked: Does forward confirmed reverse dns (fcrdns) only lookup ip to hostname and then hostname to ip or does it compare to the first hostname as well (especially in …
OsakaWebbie asked: I’m getting a huge amount of spamming attempts to random usernames. I know that it happens to all mail servers to some degree, but during the last two …
Yama asked: We just got a call from a US telephone number (001-, didn’t get the rest of it) with an automated voice, stating that someone had sent spam mails …
Pedro Lobito asked: I’ve 2 accounts on my CentOS server configured with catchall email accounts. Lately I’ve been receiving bounced emails with virus that were supposedly sent from my server …
nudora asked: I am working on a project for an environmental NGO. They want to let users use a form on their website, provide their name, their email address and …
Nick Thompson asked: I have an iRedMail server that runs Postfix and am trying to determine the source of its spam problem. I have since changed the MX records on …
user5858 asked: As suggested in How do you detect a spambot on your network? how can I setup firewall rule to allow only Postifx to send emails using SMTP on …
cardinalPilot asked: I’m trying to filter out a country that keeps probing my SMTP server (CentOS6) and I can’t seem to get the ipset to work out right in iptables. …
starbeamrainbowlabs asked: Recently I opened my server’s webmaster email inbox and found 32 “Delivery status notification failed” emails reporting the failure of the delivery of 32 emails I did not …
whelanska asked: Our company’s SPF record format is as follows: “v=spf1 include:_spf.google.com ~all a mx ip4:X.X.0.0/23 include:spf.example.com ?all” So we have an “~all” in the middle of our SPF record. …
