Software Alternatives & Reviews

Sendmail VS OpenSMTPD

Compare Sendmail VS OpenSMTPD and see what are their differences

Sendmail logo Sendmail

Sendmail is a general purpose internetwork email routing facility that supports many kinds of...

OpenSMTPD logo OpenSMTPD

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...
  • Sendmail Landing page
    Landing page //
    2022-07-11
  • OpenSMTPD Landing page
    Landing page //
    2019-03-05

Sendmail

Categories
  • SMTP Server
  • Email
  • MTA
  • Email Delivery
Website sendmail.com
Details $-

OpenSMTPD

Categories
  • SMTP Server
  • Email
  • MTA
  • Email Delivery
Website opensmtpd.org
Details $

Sendmail videos

breve configuracion de sendmail

OpenSMTPD videos

DAY[0] Episode #31 - kr00k, GhostCat, and more issues from NordVPN, Samsung, OpenSMTPd

Category Popularity

0-100% (relative to Sendmail and OpenSMTPD)
Email
68 68%
32% 32
SMTP Server
61 61%
39% 39
MTA
57 57%
43% 43
Email Delivery
67 67%
33% 33

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Sendmail and OpenSMTPD

Sendmail Reviews

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OpenSMTPD Reviews

Best Free and Open Source Alternatives to Microsoft Exchange Server
OpenSMTPD is an implementation of the server-side SMTP protocol, with some additional standard extensions. Its design goals include security, reliability, ease of configuration, and support for common use cases.

Social recommendations and mentions

Based on our record, OpenSMTPD should be more popular than Sendmail. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Sendmail mentions (1)

  • Sendmail and Exchange online - 550 5.1.10 RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address lookup
    We are using sendmail and Exchange online with to different identies. We are experience problem that we want to receive Teams invitation to our @ sendmail.com address, when I forward teams invitation fromexchange online identite to "sendemail" identetie we are getting error. Source: almost 3 years ago

OpenSMTPD mentions (2)

  • Has anyone setup a Linux based internal only smtp relay?
    I've had something of the same experience with Postfix, u/0x29aNull. Check out OpenSMTPD. It is lightweight and standards compliant. I know that there are packages for Debian and Alpine Linux. There may also be ones for Fedora/RHEL derivatives. I use it in my environment on OpenBSD. Source: about 1 year ago
  • DKIM Migration: Rpamd instead of DKIMproxy out on OpenBSD / OpenSMTPD
    When I installed Rspamd with on OpenBSD / OpenSMTPD the other day, DKIMProxy out (dkimproxy_out daemon), which had been got via OpenBSD Ports package system, was used to add DKIM signatures to mails in order to improve security on emails. - Source: dev.to / over 2 years ago

What are some alternatives?

When comparing Sendmail and OpenSMTPD, you can also consider the following products

Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

sSMTP - sSMTP is a simple MTA to deliver mail from a computer to a mail server.

Exim - Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

msmtp - msmtp is an SMTP client.

MailerQ - MailerQ is a high performance Mail Transfer Agent (MTA) designed for delivering large volume email messages at very high speeds.

Zimbra - Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.