These ports 465 and 587 are both used for sending mail (submitting mail) but what is the real difference between them?

Mar 13, 2013 · Could not connect to SMTP host: smtp.gmail.com, port: 465, response: -1 Asked 12 years, 10 months ago Modified 1 year, 8 months ago Viewed 168k times

Apr 23, 2025 · I contacted DigitalOcean support to ask if they block SMTP ports (465, 587) but have not yet received a response. It looks like outgoing connections to SMTP ports are being …

Jul 31, 2012 · How can I view the SSL certificate details that is being used on ports 587, 25, 110, 465, 995, 143 & 993 I need to check which domain name is being used to secure these ports.

In short, SMTP over Implict SSL port 465 requires TLS to be negotiated before connecting to the SMTP server. Rather than write a .Net SMTPS implementation I turned to a utility named …

Jun 25, 2016 · I was using my gmail account to send an smtp alert messages to my users email . Example, registration or account blocked etc. I am using a nodemailer and was email were …

Sep 13, 2020 · Connection could not be established with host smtp.gmail.com :stream_socket_client (): unable to connect to ssl://smtp.gmail.com:465 (Connection refused) I …

Dec 22, 2011 · I am trying to send email with Amazon's SES/SMTP and I am getting the following error: javax.mail.MessagingException: Could not connect to SMTP host: email-smtp.us-east …

Dec 28, 2024 · I'm trying to set up an SMTPS server on port 465 using Python and the aiosmtpd library. While I can connect to the server locally using openssl s_client, external mail servers …

MailConnectException: Couldn't connect to host, port: smtp.gmail.com, 465; timeout -1 Asked 8 years, 8 months ago Modified 3 years, 10 months ago Viewed 88k times