POP3:
Post Office Protocol Version 3 (RFC 1939). Supported by almost any mailbox
server. Only one mailfolder ("INBOX") can be used.
If you choose POP3 on the logon form, yawebmail will try to connect to
port 110 (default TCP/IP port for POP3) on the demanded mailbox host.
IMAP:
Internet Message Access Protocol (RFC 3501). Supported by many mailbox
servers. IMAP supports the creation of multiple folders, in which you can
organize your mails.
If you choose IMAP on the logon form, yawebmail will try to connect to
port 143 (default TCP/IP port for IMAP) on the demanded mailbox host.
POP3 (SSL) / POP3S:
Same as POP3, but all data will be transported over a SSL-Connection. Only
a few servers support this protocol.
If you choose POP3 (SSL) on the logon form, yawebmail will try to connect
to port 995 (default TCP/IP port for POP3S) on the demanded mailbox host.
IMAP (SSL) / IMAPS:
Same as IMAP, but all data will be transported over a SSL-Connection. Only
a few servers support this protocol.
If you choose IMAP (SSL) on the logon form, yawebmail will try to connect
to port 993 (default TCP/IP port for IMAPS) on the demanded mailbox host.
SMTP:
Simple Mail Transfer Protocol (RFC 821 and RFC 2821). Supported by almost
any mailserver. This protocol is used when you send an eMail via
yawebmail. By default yawebmail suggests TCP/IP port 25 for
SMTP-connections (you can change this value if necessary).
SMTP Auth.:
SMTP with authentication. Same as SMTP, but the mailserver requires the
user to authenticate himself with an username and a password.
If you want to use SMTP Auth. with yawebmail, just fill in an username and
a password on the "create new mail"-page.
SMTP/SSL:
Same as SMTP, but all data will be transported over a SSL-Connection. The
default TCP/IP port for SMTP/SSL is 465.
SMTP/TLS:
Same as SMTP, but all data will be transported over a TLS-Connection. The
default TCP/IP port for SMTP/SSL is 587.
IDN:
Internationalized Domain Name - a domain name with non-ASCII-characters.
If you send an eMail to a IDN-domain, yawebmail will automatically
translate the recipients address to its Punycode-representation.
UTF-8:
8-bit Unicode Transformation Format. All eMail-texts will be encoded with
UTF-8 by yawebmail. So the recipient should have no problem with special
characters you use (of course his client must support UTF-8, too).