Lmst

Surprise, the local part of email addresses, i.e. the part in front of the @-character, is per RFC case-sensitive. Do not mess with the local part.

Relevant when sending out challenge mails, account validation mails, password reset mails, issuing S/MIME certificates, etc.

Luckily a lot of the internet infra just ignores the case, but Apple Mail does not.

#RFC5321 #RFC #email #SMTP #MTA #SMIME

Yesterday was #DigitalIndependenceDay! #Email is vital and predates the web. Though fully federated, it’s now dominated by large providers. Luckily, alternatives like #Posteo or #ProtonMail exist. The hoster #Uberspace also offers email if you like it more hands-on. For 10+ years, I run #Postfix + #Dovecot in my homelab: Relay outbound via my domain provider’s #SMTP and use #Fetchmail to pull inbound mail to my #IMAP server.

https://di.day

#did #diday #didit #ididit #dut #dutgemacht

Eine neue #Episode des #Zeroday#Podcast ist #online: 0d130 – Der Wunsch Mail-Provider

Link zur Episode: https://0x0d.de/2026/01/0d130-der-wunsch-mail-provider/

@zeroday@podcasts.social (Stefan)
@zeroday (Sven)

#Datenschutz #DKIM #DMARC #EMail #IMAP #Informationssicherheit #ITSecurity #ITSicherheit #POP3 #privacy #Privatsphäre #SMTP #SPF

SMS2Email
Forwards SMS messages to SMTP (Email) server

#2FA #sms #SMS2Email #android #security #email #smtp

An Android application that forwards incoming SMS messages to a specified email address.

The circumstances and situations in this world so unpredictable. Carrying a SIM card in your main smartphone, where half of your life is tied in many situations, is reckless.

Leave your smartphone with a SIM card in the Nonamed-City-upon-Avon, and SMS2Email forwards the 2FA code to the City-of-January-River or somewhere else. The SIM card does not go into roaming, it will not be squeezed out along with the smartphone by the Brazilian El Bandidos de la Perros. Viva la seguridad!

You need to tinker a little with setting up mail on the device where the application will be used, since you need an App Password, which not each email provider provides it . The second mail, to which, in fact, the forward will be, can be any, even one-time.

https://github.com/SMS2Email/SMS2Email

https://f-droid.org/packages/io.github.sms2email.sms2email/

SMS2Email
Forwards SMS messages to SMTP (Email) server

#2FA #sms #SMS2Email #android #security #email #smtp

Пересылка входящих sms на указанную почту.

https://github.com/SMS2Email/SMS2Email

https://f-droid.org/packages/io.github.sms2email.sms2email/

Мир большой и разный. Обстоятельства и ситуации в нем ещё более. Таскать с собой симку, на которую привязано пол жизни во многих сценариях, скажем так, опрометчиво.

Оставляете в городе на Неве смартфон с SIM-картой, а это приложение форвардит 2FA код в Реку Января (Rio de Janeiro) или куда-то ещё. SIM-карта не уходит в роуминг, её вместе со смартфоном не отожмут бразильские el bandidos de la perros. Viva la seguridad!

Немного нужно повозиться с настройкой почты на устройстве где будет использоваться приложение, так как нужен App Password, который предоставляют не все и с вариантами. Вторая почта, на которую, собственно, и будет форвард, может быть любой, хоть одноразовой.

SMS2Email
Forwards SMS messages to SMTP (Email) server

弄了下邮件发送服务，目前在用Webhosting（无限发送额度）和Resend（感觉Resend还算不错，有免费额度，每天100封邮件，每月3000封邮件）

还了解到了什么是warm up（当然我不会去做，有风险）：
https://postmarkapp.com/guides/how-to-warm-up-a-domain

MXRouter都2026年了，活动也下架了，还挂着他的“BLACK FRIDAY 2025!”，点进去是显示售罄然后跳转到原价，“2025 Lifetime 15G Storage:15GB Domains:Unlimited Email Accounts:Unlimited... $1.00/yr”表面上是一年一美元，实际上有248美元的设置费。

在NetCup重新配置了Beszel，让他启用和发挥了更多功能，还有就是启用：OAuth：Github登录（需要到https://github.com/settings/applications/new 新增OAuth App）、OTP、MFA
只有关闭：Hide collection create and edit controls Collections/users右边才有设置按钮，才能配置OAuth、OTP、MFA

OTP、MFA需要配置SMTP，我试了Webhosting和Resend，都显示超时，才想到NetCup的邮件防火墙是默认开启的，关闭后测试成功
nc -zv smtp.resend.com 25 Connection to smtp.resend.com (54.205.195.44) 25 port [tcp/smtp] succeeded!
nc -zv smtp.resend.com 465 Connection to smtp.resend.com (54.205.195.44) 465 port [tcp/submissions] succeeded!
nc -zv smtp.resend.com 587 Connection to smtp.resend.com (54.157.71.137) 587 port [tcp/submission] succeeded!

YAML 配置可以导出定义的客户端配置，例如：
systems:
- name: ClawCloud Poping Japan/Tokyo
host: xx.xx.xx.xxx
port: 45876
token: xxx-xxx-xxx-xxx
users:
- XXX@outlook.com

然后添加了四个服务器，用于这几天迁移的参考，可以在https://gatus.feddit.social 查看迁移Status

#beszel #smtp #resend #netcup #OAuth

Vấn đề bất thường SMTP: Người dùng nhận email với nội dung liên quan đến phòng khám vật lý trị liệu Pháp, mặc dù hệ thống của người gửi sử dụng Brevo và PHPmailer để gửi email giao dịch từ DB. Brevo đình chỉ tài khoản, đổ lỗi cho người dùng. Hệ thống chạy trên VPS riêng, gửi 30,000 email/tháng trong 5 năm mà chưa từng xảy ra. Cần kiểm tra kỹ lưỡng logic tạo email và bảo mật đầu cuối? #SMTP #EmailError #Brevo #LỗiTiếngViệt #Security #WebHosting

https://www.reddit.com/r/selfhosted/comments/1qqxhi

Deploy a Self-Hosted #SMTP Relay with #Mailcow on #Ubuntu #VPS (10 Minute Quick-Start Guide) This article provides a guide to deploy a self-hosted SMTP relay with Mailcow on Ubuntu VPS.

When you deploy a self-hosted SMTP relay with Mailcow on Ubuntu VPS, you can manage email delivery securely and efficiently. This guide walks you through installing and configuring Mailcow for SMTP relaying.
What is an ...
Continued 👉 https://blog.radwebhosting.com/deploy-a-self-hosted-smtp-relay-with-mailcow-on-ubuntu-vps/?utm_source=mastodon&utm_medium=social&utm_campaign=mastodon.raddemo.host #selfhosted #selfhosting #mailserver #mailrelay

The only "irritation" I have is that this is the third time something got changed by the Exchange Team HOURS before an important meeting on breaking changes deadlines. COME ON! 😁

#SMTP #MSExchange #Security #Authentication

Several hours ago the #MSExchange Team posted an update on the #SMTP AUTH Basic #Authentication timeline. To summarize: the original date of disabling the option of March 2026 is now delayed to H2 2027 for existing tenants. Newly created tenants will have to deal with this from December 2026.

Regular web hosting account with decent mailbox size quotas is a cheap option just needs all the initial spf etc configured by you correctly works well

#mail #email #imap #smtp #selfhosting

+1 for setting up mail on your own domain remember if these companies - big or small - tell you the option of doing it yourself is bad it's to sell more of what they offer not to do you a solid

#mail #email #imap #smtp #selfhosting

Deploy a Self-Hosted #SMTP Relay with #Mailcow on #Ubuntu #VPS (10 Minute Quick-Start Guide) This article provides a guide to deploy a self-hosted SMTP relay with Mailcow on Ubuntu VPS.

When you deploy a self-hosted SMTP relay with Mailcow on Ubuntu VPS, you can manage email delivery securely and efficiently. This guide walks you through installing and configuring Mailcow for SMTP relaying.
What is an ...
Continued 👉 https://blog.radwebhosting.com/deploy-a-self-hosted-smtp-relay-with-mailcow-on-ubuntu-vps/?utm_source=mastodon&utm_medium=social&utm_campaign=mastodon.social #selfhosted #selfhosting #mailrelay #mailserver

@Catelli actually, #email (#SMTP + #IMAP) can totally be used for #InstantMessaging it is not the protocols it is the specific email providers and "big fishes" like #gmail and #Outlook the ones that put extra limitations on top like graylisting etc. with #ArcaneChat and #DeltaChat you can have sub-second (#ENCRYPTED) email delivery

Use of post-quantum cryptography in HTTPS has been steadily increasing. All major browsers, many CDNs, and most TLS libraries implement and by default enable it.

But there's more to the internet than just HTTPS. So I checked which mail servers support X25519MLKEM768 when using STARTTLS.

Unsurprisingly, fewer than 1K of MX servers for the Top1M domains support PQC. The only major providers who do are Google, Yahoo (shout-out!), and Seznam.

https://www.netmeister.org/blog/smtp-pqc.html

#pqc #tls #smtp