Score:0

Exchange Server 2019 can't send email on port 25

es flag

I have setup a windows server 2022 with Exchange 2019 and am unable to send out email because outgoing port 25 is blocked.

Vultr.com says they have removed the default SMTP block from my barebones server. They claim the port is open both inbound and outbound. Also Vultr firewall is unavailable for barebones servers.

I have done the following:

  1. Stopped the firewall (Windows Defender) completely [Image]
  2. Uninstalled virus protection
  3. Updated the LAN driver to the latest Intel driver
  4. Checked the OS several different ways for corruption

None of that has mattered.

NMAP shows that port 25 is open on the new server from our office, but closed when I go from the new server to our Office Exchange Server.

Further, telnet testing shows I can connect to the new server from our office but I can connect from the new server to our Office Exchange Server on port 25 nor to portquiz.net.

Can you think of any way or reason that Windows Server 2022 or Exchange Server could be blocking port 25? Or any other testing I could do?

Thanks in advance for your help.

Jaromanda X avatar
ru flag
do other ports work to portquiz.net?
Craig deepC avatar
es flag
Yea every other port I have tried goes right into telenet with telnet portquiz.net #
Jaromanda X avatar
ru flag
then Vultr.com is mistaken or lying
Score:0
es flag

Jaromanda X was correct, Vultr was blocking the port. It took them several weeks for them to figure out why.

I sit in a Tesla and translated this thread with Ai:

mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.