Yes.
SMTP uses TCP, not UDP.
An SMTP port is the port used to transfer email using the SMTP protocol. Typically SMTP is configured to use TCP port 25, although some servers will use TCP port 587.
the u in udp stands for unreliable and since email is important it is sent using tcp through say smtp or pop3
smtp
No it uses UDP packets.
SMTP was designed to send email between computers in network. And uses TCP for reliability.
Yes, using various TCP/IP protocols along with MIME can significantly increase network stability. This is why most industry standards use MIME instead of the former standard, SMTP
Smtp and tcp/ip
UDP: DNS, TFTP, DHCP... TCP: SMTP, HTTP, HTTPS, DNS, FTP, SHH, Telnet...
FTP; HTTP; DNS (uses both TCP and UDP); several e-mail protocols including POP3, SMTP, IMAP4.
SMTP Port 25 Conquerorthecomputer.blogspot.com
SMTP is simple mail transport protocol. SNMP is simple network management protocol that is UDP based.