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?
Sometimes couldn't connect to host, port: smtp.office365.com, …
Mar 13, 2025 · Sometimes couldn't connect to host, port: smtp.office365.com, 587; timeout -1; Asked 9 months ago Modified 9 months ago Viewed 331 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 …
sockets - Sending emails through Java - Stack Overflow
Sep 28, 2014 · Sending emails through Java - javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 587; Asked 11 years, 3 months ago Modified 9 years, 8 months …
email - Using SMTP, Gmail, and STARTTLS - Stack Overflow
Jun 1, 2016 · Gmail exposes port 465 for SMTP over SSL and port 587 for SMTP with STARTTLS, as documented here. The difference between these two is that SMTP over SSL …
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.
Telnet smtp.mail - must issue STARTTLS command first
Sep 19, 2015 · You're required to start encrypting the connection first. This is done using the STARTTLS command. You can use the following command instead of telnet: openssl s_client …
Connection could not be established with host smtp.office365.com ...
Apr 7, 2022 · MAIL_PORT=587 MAIL_USERNAME= //your username MAIL_PASSWORD= //your password MAIL_ENCRYPTION=tls according to this issue discussions, it seems that it may …
Connecting to smtp.gmail.com via command line - Stack Overflow
Oct 4, 2009 · A blank command window with title Telnet smtp.gmail.com opens with cursor. When I type in EHLO or usual SMTP handshake commands, the prompt just closes. I am unable to …
How can I convert an RGB image into grayscale in Python?
Aug 30, 2012 · I'm trying to use matplotlib to read in an RGB image and convert it to grayscale. In matlab I use this: