Switching sending to port 26

Question: Will your Advanced SMTP Server have the ability to choose a different port for sending, such as port 26, because my ISP blocks port 25?

Brief Answer: It just doesn't make sense, since it will not work.

Answer: Even if we will enable that option, if you choose a different port, other than 25, nobody will be able to receive your emails, because all SMTP hosts and servers work on port 25 which is a standard for SMTP as defined by Internet Engineering Task Force(IETF). You can specify port in your email program, but that is only when your own SMTP Server is configured to receive connections on port other than 25. But from your SMTP to the destination SMTP, I can pretty much assure you it goes on the port 25, other programs take other ports. Here is just a partial services file that shows you how different programs use different ports as standard.

echo 7/tcp echo 7/udp discard 9/tcp sink null discard 9/udp sink null systat 11/tcp users #Active users systat 11/tcp users #Active users daytime 13/tcp daytime 13/udp qotd 17/tcp quote #Quote of the day qotd 17/udp quote #Quote of the day chargen 19/tcp ttytst source #Character generator chargen 19/udp ttytst source #Character generator ftp-data 20/tcp #FTP, data ftp 21/tcp #FTP. control telnet 23/tcp smtp 25/tcp mail #Simple Mail Transfer time 37/tcp timserver time 37/udp timserver rlp 39/udp resource #Resource Location nameserver 42/tcp name #Host Name Server nameserver 42/udp name #Host Name Server nicname 43/tcp whois domain 53/tcp #Domain Name Server domain 53/udp #Domain Name Server bootps 67/udp dhcps #Bootstrap Protocol Server bootpc 68/udp dhcpc #Bootstrap Protocol Client tftp 69/udp #Trivial File Transfer gopher 70/tcp finger 79/tcp http 80/tcp www www-http #World Wide Web kerberos 88/tcp krb5 kerberos-sec #Kerberos kerberos 88/udp krb5 kerberos-sec #Kerberos hostname 101/tcp hostnames #NIC Host Name Server iso-tsap 102/tcp #ISO-TSAP Class 0 rtelnet 107/tcp #Remote Telnet Service pop2 109/tcp postoffice #Post Office Protocol - Version 2 pop3 110/tcp #Post Office Protocol - Version 3 sunrpc 111/tcp rpcbind portmap #SUN Remote Procedure Call sunrpc 111/udp rpcbind portmap #SUN Remote Procedure Call auth 113/tcp ident tap #Identification Protocol uucp-path 117/tcp nntp 119/tcp usenet #Network News Transfer Protocol ntp 123/udp #Network Time Protocol epmap 135/tcp loc-srv #DCE endpoint resolution epmap 135/udp loc-srv #DCE endpoint resolution netbios-ns 137/tcp nbname #NETBIOS Name Service netbios-ns 137/udp nbname #NETBIOS Name Service netbios-dgm 138/udp nbdatagram #NETBIOS Datagram Service netbios-ssn 139/tcp nbsession #NETBIOS Session Service imap 143/tcp imap4 #Internet Message Access Protocol pcmail-srv 158/tcp #PCMail Server snmp 161/udp #SNMP snmptrap 162/udp snmp-trap #SNMP trap

Advanced SMTP Server is a system-tray local SMTP server program for Windows that lets you send email messages directly from your computer to recipient mailboxes. The program insures your email security and privacy and along with a subscription-based mass mailer can be used as a relay server for sending requested newsletters, distributing messages to different mailing lists, sending notifications to your customers, as well as for sending personalized messages.