BBS:      TELESC.NET.BR
Assunto:  SPF DKIM DMARC
De:       Digital Man
Data:     Mon, 27 Apr 2026 19:51:57 -0700
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  hbRenb: hcSPF DKIM DMARC
  bBynb: hcRaymar bto cDigital Man bon cMon Apr 27 2026 08:25 pmn

 > Yeah. That didn't work.
 >
 > cvs.synchro.net reporting delivery failure of message
 > from Raymar to raymars.music@gmail.com
 >
 > Reason:
 > gmail-smtp-in.l.google.com replied with:
 > "550 5.7.26 https://support.google.com/mail/answer/81126#authentication
 > a92af1059eb24-12ddd942807si1952775c88.35 - gsmtp"
 > instead of the expected reply:
 > "250 ..."

$ host -t txt geo.synchro.net
geo.synchro.net descriptive text "v=spf1 mx a -all"
$ host -t mx geo.synchro.net
geo.synchro.net has no MX record

Do you see the problem? Your SPF record says your MX can send mail, yet you have no MX record. Like the wiki page says, this works
"If your sending mail server is also the mail exchange (receiving mail server) for your domain", so you need to make mail.synchro.net the MX for your domain (explained on the same wiki page).
-- 
                                            HYdigital man n(rob)

Synchronet/BBS Terminology Definition #39:
FTSC = FidoNet Technical Standards Committee
Norco, CA WX: 58.3F, 59.0% humidity, 8 mph WNW wind, 0.00 inches rain/24hrs
n---
  mSynchronetn  hgVertrauen n hHome of Synchronet n gh[vert/cvs/bbs].synchro.net

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