What is the difference between ports 465 and 587? [closed]
These ports 465 and 587 are both used for sending mail (submitting mail) but what is the real difference between them?
Cannot connect to smtp.hostinger.com on ports 465/587 after ...
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 blocked after the …
Why does Send-MailMessage fail to send using STARTTLS over Port 587
Dec 14, 2018 · Why does Send-MailMessage fail to send using STARTTLS over Port 587 Asked 7 years, 1 month ago Modified 2 years, 11 months ago Viewed 36k times
Python freezes on smtplib.SMTP ("smtp.gmail.com", 587)
May 31, 2018 · I am attempting to create a script that send an email, using Gmail. However, my code freezes when the line below is ran: smtplib.SMTP ("smtp.gmail.com", 587) It is before my username …
view SSL certificate on ports 587, 25, 110, 465, 995, 143, 993
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.
GMail SMTP STARTTLS on Port 587 no longer works - Stack Overflow
Apr 20, 2020 · My company has 4 different third party applications that use 4 different gmail addresses to send mail over port 587. One of the applications is distributed across over a hundred clients. All …
Linux configuration -- ssmtp: Cannot open smtp.gmail.com:587
Feb 1, 2016 · Linux configuration -- ssmtp: Cannot open smtp.gmail.com:587 Asked 9 years, 11 months ago Modified 1 year, 4 months ago Viewed 65k times
Can not send mail using smtp.gmail.com, port 587 from vbs script
Feb 19, 2015 · I am trying to send a mail using a vbs script but it doesn't work. I am using server smtp.gmail.com and port 587. The weir thing is that this works when I change the port to 25. Below is …
ERROR => ERROR => SMTP-AUTH: Authentication to …
Jul 16, 2019 · 1 I had faced the same issue and could resolve it. You can use the tls auto, 587 port command. Able to successfully send an email using Gmail SMTP.
Postfix is using port 25 when I have specified it to use 587
Apr 9, 2021 · I was attempting to avoid this problem by forcing Postfix to send on port 587 instead of port 25. After careful setup & troubleshooting, all of my attempts to send test-emails on the command line …