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OpenSMTPD VS Sendmail

Compare OpenSMTPD VS Sendmail and see what are their differences

MailReach.co
The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder. featured
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OpenSMTPD logo OpenSMTPD

OpenSMTPD is a FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with...

Sendmail logo Sendmail

Sendmail is a general purpose internetwork email routing facility that supports many kinds of...
  • OpenSMTPD Landing page
    Landing page //
    2019-03-05
  • Sendmail Landing page
    Landing page //
    2022-07-11

OpenSMTPD videos

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

Sendmail videos

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breve configuracion de sendmail

Category Popularity

0-100% (relative to OpenSMTPD and Sendmail)

OpenSMTPD

Sendmail

SMTP Server
39 39%
SMTP Server
61% 61
Email
32 32%
Email
68% 68
MTA
44 44%
MTA
56% 56
Email Delivery
100 100%
Email Delivery
0% 0

User comments

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Reviews

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

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.
Source: www.linuxlinks.com

Sendmail Reviews

We have no reviews of Sendmail yet.
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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.

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 / almost 3 years ago

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: about 3 years ago

What are some alternatives?

When comparing OpenSMTPD and Sendmail, 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.

iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).

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