I first tough that the SSL settings or certificate could be wrong, but I checked them by using the command openssl s_client -showcerts -connect imap.foo.com:993 -crlf and everything seems to be alright. Is it then necessary to have 143 port enabled to use the 993 for an SSL IMAP connection? Is it for being capable of establishing the first contact?

2015年10月8日 · How do I get my hMailServer to work and allow the other pcs on my home network connect to it? The control panel interface to allow apps to communicate through the firewall has tick-marks in all the

2022年7月12日 · EndPoint was created with TLS and Port 143 successfully Now when I try to migrate email to exchange online using IMAP migration the migration is failed everytime. Looking on to some of the websites I come to know that microsoft donot support port 143 but supports port 993 but didnot found any legitimate answers.

2015年8月30日 · I want to block smtp 25, pop 110 & imap 143 and only use secured smtps 465, pop3s 995 & imaps 993. Are there good reasons to let port 25,110,143 open?

TCP Ports 25 (SMTP)/110 (POP3)/143 (IMAP) should be opened on the server firewall and the router (if you want the server to be accessible from the Internet/another network). What are the telnet results when (telnet 127.0.0.1 [port number]) is attempted from the server itself?

2019年9月9日 · Port 465 and 587 are used for users of your system sending emails out. You probably only need 1 of these to - 587 is the more commonly used port. Port 143 is unencrypted IMAP, and I would close it altogether. Port 993 is encrypted IMAP, and you need this open if you want people to be able to receive email without using the VPN.

2013年7月17日 · Allowing Edge Traversal didn't work for me when I tried to open up just port 143. Here is the Windows 7 firewall setting I had to use to allow other computers to connect to my hMailServer.

2016年6月26日 · My provider uses port 143 for incoming messages and 587 for smtp (both non SSL). I'm able to add this account on Outlook 2016 (desktop app), but not on Outlook for Windows 10.

Ubuntu typically also does not let servers listen off of localhost by default. On the server, run netstat -an|grep 143 and update the question with the results. Also, what imap server are you using, and is it running?

2021年4月29日 · I'm having a hell of a time with some versions of Outlook not being able to log into my server over port 993. These clients have to use port 143 and with ssl = required and disable_plaintext_auth = no.