SMTP Port 587 vs 465: Which Port Should You Use?

SMTP port 587 vs 465: which should you use? Port 587 with StartTLS is the current standard. Quick guide to SMTP ports, configuration, and troubleshooting.


This content originally appeared on Twilio Blog and was authored by nJesse Sumrak, David Blumn

SMTP port 587 vs 465: which should you use? Port 587 with StartTLS is the current standard. Quick guide to SMTP ports, configuration, and troubleshooting.


This content originally appeared on Twilio Blog and was authored by nJesse Sumrak, David Blumn


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nJesse Sumrak, David Blumn | Sciencx (2025-08-28T00:00:00+00:00) SMTP Port 587 vs 465: Which Port Should You Use?. Retrieved from https://www.scien.cx/2025/08/28/smtp-port-587-vs-465-which-port-should-you-use-48/

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" » SMTP Port 587 vs 465: Which Port Should You Use?." nJesse Sumrak, David Blumn | Sciencx - Thursday August 28, 2025, https://www.scien.cx/2025/08/28/smtp-port-587-vs-465-which-port-should-you-use-48/
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nJesse Sumrak, David Blumn | Sciencx Thursday August 28, 2025 » SMTP Port 587 vs 465: Which Port Should You Use?., viewed ,<https://www.scien.cx/2025/08/28/smtp-port-587-vs-465-which-port-should-you-use-48/>
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nJesse Sumrak, David Blumn | Sciencx - » SMTP Port 587 vs 465: Which Port Should You Use?. [Internet]. [Accessed ]. Available from: https://www.scien.cx/2025/08/28/smtp-port-587-vs-465-which-port-should-you-use-48/
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" » SMTP Port 587 vs 465: Which Port Should You Use?." nJesse Sumrak, David Blumn | Sciencx - Accessed . https://www.scien.cx/2025/08/28/smtp-port-587-vs-465-which-port-should-you-use-48/
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" » SMTP Port 587 vs 465: Which Port Should You Use?." nJesse Sumrak, David Blumn | Sciencx [Online]. Available: https://www.scien.cx/2025/08/28/smtp-port-587-vs-465-which-port-should-you-use-48/. [Accessed: ]
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» SMTP Port 587 vs 465: Which Port Should You Use? | nJesse Sumrak, David Blumn | Sciencx | https://www.scien.cx/2025/08/28/smtp-port-587-vs-465-which-port-should-you-use-48/ |

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