A List of SMTP and IMAP Server

Default Ports:Server:Authentication:Port:
SMTP Server (Outgoing Messages)Non-EncryptedAUTH25 (or 587)
 Secure (TLS)StartTLS587
 Secure (SSL)SSL465
IMAP Server (Incoming Messages)Non-EncryptedAUTH143
 Secure (TLS)StartTLS143
 Secure (SSL)SSL993


Googlemail – GmailServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.gmail.comSSL465
 smtp.gmail.comStartTLS587
IMAP Server (Incoming Messages)

Please make sure, that IMAP access is enabled in the account settings.
Login to your account and enable IMAP.
You also need to enable “less secure apps” (third party apps) in the Gmail settings:
https://support.google.com/accounts/answer/6010255?hl=en
See also: How to enable IMAP/POP3/SMTP for Gmail account
imap.gmail.comSSL993

Outlook.comServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp-mail.outlook.comStartTLS587
IMAP Server (Incoming Messages)imap-mail.outlook.comSSL993
Office365.comServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.office365.comStartTLS587
IMAP Server (Incoming Messages)outlook.office365.comSSL993
 Note: If the above settings are not working for your account, then login into the outlook web app, go to the “Settings” > “Options” > “Account” > “My Account” > “Settings for POP and IMAP Access”.
Yahoo MailServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.mail.yahoo.comSSL465
IMAP Server (Incoming Messages)imap.mail.yahoo.comSSL993
Yahoo Mail PlusServer:Authentication:Port:
SMTP Server (Outgoing Messages)plus.smtp.mail.yahoo.comSSL465
IMAP Server (Incoming Messages)plus.imap.mail.yahoo.comSSL993
Yahoo Mail UKServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.mail.yahoo.co.ukSSL465
IMAP Server (Incoming Messages)imap.mail.yahoo.co.ukSSL993
Yahoo Mail DeutschlandServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.mail.yahoo.comSSL465
IMAP Server (Incoming Messages)imap.mail.yahoo.comSSL993
Yahoo Mail AU/NZServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.mail.yahoo.auSSL465
IMAP Server (Incoming Messages)imap.mail.yahoo.auSSL993
AOL.comServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.aol.comStartTLS587
IMAP Server (Incoming Messages)imap.aol.comSSL993
AT&TServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.att.yahoo.comSSL465
IMAP Server (Incoming Messages)imap.att.yahoo.comSSL993
NTL @ntlworld.comServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.ntlworld.comSSL465
IMAP Server (Incoming Messages)imap.ntlworld.comSSL993
BT ConnectServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.btconnect.com 25
IMAP Server (Incoming Messages)imap4.btconnect.com 143
O2 DeutschlandServer:Authentication:Port:
SMTP Server (Outgoing Messages)mail.o2online.de 25
IMAP Server (Incoming Messages)imap.o2online.de 143
T-Online DeutschlandServer:Authentication:Port:
SMTP Server (Outgoing Messages)securesmtp.t-online.deStartTLS587
IMAP Server (Incoming Messages)secureimap.t-online.deSSL993
1&1 (1and1)Server:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.1and1.comStartTLS587
IMAP Server (Incoming Messages)imap.1and1.comSSL993
1&1 DeutschlandServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.1und1.deStartTLS587
IMAP Server (Incoming Messages)imap.1und1.deSSL993
VerizonServer:Authentication:Port:
SMTP Server (Outgoing Messages)outgoing.verizon.net 587
IMAP Server (Incoming Messages)incoming.verizon.net 143
zoho MailServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.zoho.comSSL465
IMAP Server (Incoming Messages)imap.zoho.comSSL993
Mail.comServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.mail.comStartTLS587
IMAP Server (Incoming Messages)imap.mail.comSSL993
GMX.comServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.gmx.comSSL465
IMAP Server (Incoming Messages)imap.gmx.comSSL993
Net@ddress by USA.NETServer:Authentication:Port:
SMTP Server (Outgoing Messages)smtp.postoffice.netSSL465
IMAP Server (Incoming Messages)imap.postoffice.netSSL993
+ Add ProviderServer:Authentication:Port:
SMTP Server (Outgoing Messages)Contact us to add your provider  
IMAP Server (Incoming Messages)