What is the difference between port 465 and 587

Ask Question. Asked 8 years, 7 months ago. Active 1 year, 6 months ago. Viewed k times. Improve this question. Ilia Ilia The only difference is formalized standards and port is for legacy support? Add a comment. Active Oldest Votes. SMTP protocol: smtps port v. Improve this answer. AnFi AnFi Standard SMTP port accepts email from other mail server without authentication - is not actually technically correct. Standard 25 port can transfer mail both using authentication and not depending on the configuration of MTA.

How about Postfix? It doesn't let relaying mail by default but only for connections from same network? Ilia There is also incoming mail to local email domains.

Note that while unofficial, port offers the end user more assurance that they are really talking over an encrypted channel. Port , with TLS being optional, means an end user could be providing their credentials over an unencrypted channel.

With email clients being what they are, you cannot guarantee the MUA is going to even alert the user that the connection has been downgraded. Show 3 more comments. Described in RFC Community Bot 1 1 1 silver badge. We're committed to your privacy. By submitting your information, you give us consent to contact you about our relevant content, products, and services. For more details, refer to our privacy policy. We've also been able to create highly complex cohorts and effective engagement campaigns".

Download the. Request a demo Yes No. Thank you Please wait while we grab a copy for you Written by. How to check if Port is blocked on your network? When a mail client or server is submitting an email to be routed by a proper mail server, it should always use this port. Port is no longer an accepted standard for SMTP. As of , IANA port assignments include the re-assigned Port , now clearly identified as submissions - an alternative to the submission port, not the smtp port. Sign up or log in Sign up using Google.

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