However, if you know the TCP port used (see above), you can filter on that one. You cannot directly filter SMTP protocols while capturing. Show only the SMTP based traffic with the "MAIL FROM" command: contains "FROM" Display FilterĪ complete list of SMTP display filter fields can be found in the display filter reference Keep it short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically. XXX - Add a simple example capture file to the SampleCaptures page and link from here. (XXX add links to preference settings affecting how SMTP is dissected). XXX - Add example traffic here (as plain text or Wireshark screenshot). SMTP uses MIME_multipart to transfer attachments Dont you have to use instead of eq nixda at 23:33 That works, Jake. The well known TCP port for SMTP traffic is 25. 1 What happens when you attempt to use the IP address like this: ip.dsthost eq 216.239.139.240 Giacomo1968 at 23:33 You can filter for the IP (ping the server to get it) with ip.addr 123.123.2.1. TCP: Typically, SMTP uses TCP as its transport protocol. SMTP is existing since the early days of the internet and was one of the first protocols used. Receiving mail from a server - on the other hand - is done using POP or IMAP. ![]() Trace with Hping and SYN flag filter: Test.This protocol is widely use to send e-Mail from the authors mail program to the mail server and between servers too.
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