System Information

Supported SMTP services, ports, and protocols

Supported SMTP Ports

25

SMTP

None / STARTTLS

Standard SMTP port, often blocked by ISPs

26

Alternative SMTP

None / STARTTLS

Alternative to port 25 when blocked

587

SMTP + STARTTLS

STARTTLS

Recommended for email submission

465

SMTP + SSL/TLS

SSL/TLS

Legacy SSL port, still widely used

2525

Alternative SMTP

STARTTLS

Alternative when 587 is blocked

2526

Alternative SMTP

STARTTLS

Another alternative port

Encryption Methods

🔓

PLAIN SMTP

No encryption (not recommended)

🔒

STARTTLS

Upgrade to TLS after connection

🔐

TLS v1.2+

Modern TLS encryption

🔐

SSL

Legacy SSL encryption

Authentication Methods

👤

LOGIN

Basic username/password

📝

PLAIN

Plain text authentication

🔑

CRAM-MD5

Challenge-response auth

🔐

XOAUTH2

OAuth 2.0 (Google, Microsoft)

Supported SMTP Providers

100 providers

Outlook

587

Microsoft Outlook/Office 365

smtp.office365.com
outlook.comhotmail.com

iCloud

587

Apple iCloud Mail

smtp.mail.me.com
icloud.comme.com

AOL

587

AOL Mail

smtp.aol.com
aol.com

Zoho Mail

587

Zoho Mail SMTP

smtp.zoho.com
zoho.comzohomail.com

GMX

465

GMX Mail

mail.gmx.com
gmx.comgmx.net

Mail.com

587

Mail.com

smtp.mail.com
mail.com

ProtonMail

587

ProtonMail (Bridge required)

mx.protonmail.ch
protonmail.comproton.me

FastMail

587

FastMail

smtp.fastmail.com
fastmail.comfastmail.fm

Tutanota

587

Tutanota

smtp.tutanota.com
tutanota.comtutanota.de

Hushmail

587

Hushmail

mail.hushmail.com
hushmail.com

Runbox

587

Runbox

smtp.runbox.com
runbox.com

Mailfence

587

Mailfence

smtp.mailfence.com
mailfence.com

StartMail

587

StartMail

smtp.startmail.com
startmail.com

Posteo

587

Posteo

smtp.posteo.de
posteo.deposteo.net

Mailbox.org

587

Mailbox.org

smtp.mailbox.org
mailbox.org

Disroot

587

Disroot

smtp.disroot.org
disroot.org

Cock.li

587

Cock.li

smtp.cock.li
cock.liairmail.cc

Vivaldi Mail

587

Vivaldi Mail

smtp.vivaldi.net
vivaldi.net

Kolab Now

587

Kolab Now

smtp.kolabnow.com
kolabnow.com

Migadu

587

Migadu

smtp.migadu.com

HEY

587

HEY

smtp.hey.com
hey.com

La Poste

587

La Poste (France)

mail.laposte.net
laposte.net

Orange

587

Orange (France)

smtp.orange.fr
orange.frwanadoo.fr

SFR

587

SFR (France)

smtp.sfr.fr
sfr.frneuf.fr

T-Online

587

T-Online (Germany)

smtp.t-online.de
t-online.de

Seznam.cz

587

Seznam.cz (Czech Republic)

smtp.seznam.cz
seznam.czemail.cz

Walla

587

Walla! Mail (Israel)

smtp.walla.co.il
walla.co.ilwalla.com

Naver Mail

587

Naver Mail (Korea)

mail.naver.com
naver.com

Daum Mail

587

Daum Mail (Korea)

smtp.daum.net
daum.nethanmail.net

QQ Mail

587

QQ Mail (China)

smtp.qq.com
qq.com

163.com

587

NetEase 163 (China)

smtp.163.com
163.com

126.com

587

NetEase 126 (China)

mail.126.com
126.com

Sina Mail

587

Sina Mail (China)

smtp.sina.com
sina.comsina.cn

Sohu Mail

587

Sohu Mail (China)

smtp.sohu.com
sohu.com

Mynet

587

Mynet Mail (Turkey)

smtp.mynet.com
mynet.com

Yandex

587

Yandex Mail (Russia)

smtp.yandex.com
yandex.comyandex.ru

Mail.ru

587

Mail.ru (Russia)

smtp.mail.ru
mail.ruinbox.ru

Rambler

587

Rambler Mail (Russia)

smtp.rambler.ru
rambler.ruro.ru

Ukr.net

587

Ukr.net (Ukraine)

smtp.ukr.net
ukr.neti.ua

Mail.tm

587

Mail.tm (Temporary Email)

smtp.mail.tm
mail.tm

Guerrilla Mail

587

Guerrilla Mail

smtp.guerrillamail.com
guerrillamail.com

10 Minute Mail

587

10 Minute Mail

smtp.10minutemail.com
10minutemail.com

Lycos Mail

587

Lycos Mail

smtp.lycos.com
lycos.com

Excite Mail

587

Excite Mail

smtp.excite.com
excite.com

KeeMail

587

KeeMail

smtp.keemail.me
keemail.me

Autistici

587

Autistici

smtp.autistici.org
autistici.orginventati.org

Ctemplar

587

Ctemplar (Deprecated)

smtp.ctemplar.com
ctemplar.com

OpenMailbox

587

OpenMailbox (Deprecated)

smtp.openmailbox.org
openmailbox.org

SendGrid

587

SendGrid SMTP

smtp.sendgrid.net

Mailgun

587

Mailgun SMTP

smtp.mailgun.org

Amazon SES

587

Amazon SES

email-smtp.us-east-1.amazonaws.com

SparkPost

587

SparkPost

smtp.sparkpostmail.com

Mailjet

587

Mailjet

in-v3.mailjet.com

Mandrill

587

Mandrill (Mailchimp)

smtp.mandrillapp.com

Brevo

587

Brevo (SendinBlue)

smtp-relay.brevo.com

Postmark

587

Postmark

smtp.postmarkapp.com

SendPulse

587

SendPulse

smtp-pulse.com

Elastic Email

2525

Elastic Email

smtp.elasticemail.com

Pepipost

587

Pepipost

smtp.pepipost.com

PolarisMail

587

PolarisMail

smtp.polarismail.com

MailSnare

587

MailSnare

smtp.mailsnare.net

Hoster.by

587

Hoster.by (Belarus)

smtp.hoster.by

Reg.ru

587

Reg.ru (Russia)

smtp.domain.ru

Beget

587

Beget Hosting (Russia)

mail.beget.com

GoDaddy

587

GoDaddy Hosting

smtpout.secureserver.net

HostGator

587

HostGator Hosting

gator4168.hostgator.com

Bluehost

587

Bluehost Hosting

box5331.bluehost.com

SiteGround

587

SiteGround Hosting

mail.yourdomain.com

Namecheap

587

Namecheap Private Email

mail.privateemail.com

IONOS

587

IONOS (1&1) Hosting

smtp.ionos.com

DreamHost

587

DreamHost Hosting

smtp.dreamhost.com

OVH

587

OVH Hosting

ssl0.ovh.net

Hostinger

587

Hostinger Hosting

smtp.hostinger.com

DigitalOcean

587

DigitalOcean

mail.yourdomain.com

Hover

587

Hover

smtp.hover.com

Register.com

587

Register.com

smtp.register.com

Network Solutions

587

Network Solutions

smtp.networksolutions.com

Thexyz

587

Thexyz

smtp.thexyz.com

SecureMail.pro

587

SecureMail.pro

smtp.securemail.pro

MXroute

587

MXroute

smtp.mxroute.com

CTmail

587

CTmail

smtp.ctmail.com

NeoMailbox

587

NeoMailbox

smtp.neomailbox.net

StartLogic

587

StartLogic

smtp.startlogic.com

HostPapa

587

HostPapa

smtp.hostpapa.com

A2 Hosting

587

A2 Hosting

smtp.a2hosting.com

InMotion Hosting

587

InMotion Hosting

smtp.inmotionhosting.com

GreenGeeks

587

GreenGeeks

smtp.greengeeks.com

IceWarp

587

IceWarp

smtp.icewarp.com

Kerio Connect

587

Kerio Connect

smtp.kerio.com

Zimbra

587

Zimbra

smtp.zimbra.com

iRedMail

587

iRedMail

smtp.iredmail.org

MailEnable

587

MailEnable

smtp.mailenable.com

hMailServer

587

hMailServer

smtp.hmailserver.com

Axigen

587

Axigen

smtp.axigen.com

Atlassian

587

Atlassian (Jira/Confluence)

smtp.atlassian.com

Google Workspace

587

Google Workspace SMTP Relay

smtp-relay.gmail.com

Microsoft 365

587

Microsoft 365

smtp.office365.com

Gmail

587

Gmail SMTP Server

smtp.gmail.com
gmail.comgooglemail.com

Yahoo Mail

587

Yahoo Mail SMTP

smtp.mail.yahoo.com
yahoo.comyahoo.co.uk

Custom

587

Custom SMTP Server