need help

[rbowman]

On Mon, 24 Oct 2022 10:02:10 +1100, Cameron Simpson wrote:


> I'd say GMail are rudely dropping traffic to port 2525. Maybe try just
> 25,
> the normal SMTP port?

2525 is an alternative to 587, the standard TLS port. 25  and 587 work.

telnet smtp.gmail.com 587
Trying 2607:f8b0:4023:1004::6d...
Connected to smtp.gmail.com.
Escape character is '^]'.
220 smtp.gmail.com ESMTP s6-20020a056870ea8600b0010bf07976c9sm13154711oap.
41 - gsmtp
EHLO
501-5.5.4 Empty HELO/EHLO argument not allowed, closing connection.
501 5.5.4  https://support.google.com/mail/?p=helo 
s6-20020a056870ea8600b0010bf07976c9sm13154711oap.41 - gsmtp
Connection closed by foreign host.


The EHLO needs a domain.  Port 25 is the same.