Comcast has the SMTP server "smtp.comcast.net" (without quotes) and will use port 465 with SSL encryption, and port 587 with TLS encryption. Note: If your email service provider is not included in this list, you can simply Google the following and find the information you need: "*email provider* + SMTP …

Connect to a host on a given port. The defaults are to connect to the local host at the standard SMTP port (25). If the hostname ends with a colon (':') followed by a number, that suffix will be stripped off and the number interpreted as the port number to use. This method is automatically invoked by the constructor if a host is specified POP3 vs IMAP and SMTP: Understanding the Differences Mar 04, 2020 Well known SCTP, TCP and UDP ports, 0 through 999 Port Transport Protocol; 100 : 101: TCP: HOSTNAME.: 102: TCP: TP0 over TCP.: 103: TCP, UDP: Genesis Point-to-Point Trans Net. 104 : ACR-NEMA Digital Imag. & Comm. 300 Email client protocols and port numbers – DreamHost Mar 17, 2020

In this case you can try to use port 587 or port 465 to avoid the block. More in detail: port 587 is supported by almost every outgoing SMTP server and it’s useful for unencrypted or TLS connections; while port 465 is the right choice if you need to connect via SSL. turboSMTP can work both on port 587 and 465, but also on 2525 and 25025

Next to SMTP relay service, click Configure. Set up the SMTP relay service. See: SMTP relay: Route outgoing non-Gmail messages through Google; On your device or in your app, on port 25, 465, or 587, connect to smtp-relay.gmail.com. Oct 05, 2019 · SMTP port (SSL): 465; SMTP TLS/SSL required: yes; Once you add your account to an email client of your choice, the first thing you’ll likely be required to do is enter your email address and - smtp.mail.att.net / Port 465 or 587 - outbound.att.net / Port 465 I guess the right answer is one of these. Also I need to know if the Port 587 and the Port 2525 are blocked. Actually in order to find the answer I would like to run a "telnet" test but I need to know what is the SMTP server.

In this case you can try to use port 587 or port 465 to avoid the block. More in detail: port 587 is supported by almost every outgoing SMTP server and it’s useful for unencrypted or TLS connections; while port 465 is the right choice if you need to connect via SSL. turboSMTP can work both on port 587 and 465, but also on 2525 and 25025

Mar 04, 2020 Well known SCTP, TCP and UDP ports, 0 through 999 Port Transport Protocol; 100 : 101: TCP: HOSTNAME.: 102: TCP: TP0 over TCP.: 103: TCP, UDP: Genesis Point-to-Point Trans Net. 104 : ACR-NEMA Digital Imag. & Comm. 300 Email client protocols and port numbers – DreamHost Mar 17, 2020