Hi Digital Man,

By chance, are internet emails getting held up in mail.synchro.net during relay? Over the last few days I've been seeing SEND/TLS warnings like this one:

2/18 11:53:42a 14144 SEND/TLS [mail.synchro.net] WARNING 'Bad/unrecognized data format' (-32) setting session active

It still says it's successfully sending the message on port 587, however messages are not showing up in the destination inboxes.

|01<|09co|03d|11e|15Ÿ|11e|03n|09ix|01>|07


...Money can't buy friends but you can get a better class of enemy.
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Re: mail.synchro.net SEND/TLS warnings
By: Codefenix to Digital Man on Sun Feb 18 2024 12:02 pm

Hi Digital Man,

By chance, are internet emails getting held up in mail.synchro.net during relay? Over the last few days I've been seeing SEND/TLS warnings like this one:

2/18 11:53:42a 14144 SEND/TLS [mail.synchro.net] WARNING 'Bad/unrecognized data format' (-32) setting session active

It still says it's successfully sending the message on port 587, however messages are not showing up in the destination inboxes.

I suspect this is because you don't have an SPF record for your domain name. I see this delivery failure message has been sent in response to one of your relay attempts to a gmail address:

"550 5.7.26 https://support.google.com/mail/answer/81126#authentication e14-200
20a170902ef4e00b001d9481c14bcsi3112996plx.414 - gsmtp"

Nightfox was also recently reporting this problem and I think the solution is the same: create an SPF record for your domain that specifies that mail.synchro.net is allowed to send mail for your domain.
--
digital man (rob)

This Is Spinal Tap quote #10:
Dozens of people spontaneously combust each year... just not widely reported. Norco, CA WX: 63.2øF, 61.0% humidity, 0 mph SW wind, 0.00 inches rain/24hrs
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Re: mail.synchro.net SEND/TLS warnings
By: Digital Man to Codefenix on Sun Feb 18 2024 01:24 pm

I suspect this is because you don't have an SPF record for your domain name. I see this delivery failure message has been sent in response to one of your relay attempts to a gmail address:

Ah, OK. Thanks for checking and finding this. I did eventually get that response, although it took a while.

Nightfox was also recently reporting this problem and I think the solution is the same: create an SPF record for your domain that specifies that mail.synchro.net is allowed to send mail for your domain.

OK. I use the dyndns module, so I added the following to my modopts.ini file:

[dyndns]
txt = v=spf1 include:mail.synchro.net ~all

After a while I was able to see the SPF record with nslookup.

Tested again, and I was able to get an email out to my sbcglobal address (yes, it's quite an old address :P). So far not getting through to gmail though. Maybe gmail is stricter...? Wondering whether I need to worry about a DMARC record as well, and if so, is it possible to include multiple TXT records for the dyndns module?

|01<|09co|03d|11e|15Ÿ|11e|03n|09ix|01>|07


...Ending sentences with prepositions is something up with which I will not put.
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Re: mail.synchro.net SEND/TLS warnings
By: Codefenix to Digital Man on Mon Feb 19 2024 11:51 am

Re: mail.synchro.net SEND/TLS warnings
By: Digital Man to Codefenix on Sun Feb 18 2024 01:24 pm

I suspect this is because you don't have an SPF record for your domain name. I see this delivery failure message has been sent in response to one of your relay attempts to a gmail address:

Ah, OK. Thanks for checking and finding this. I did eventually get that response, although it took a while.

Nightfox was also recently reporting this problem and I think the solution is the same: create an SPF record for your domain that specifies that mail.synchro.net is allowed to send mail for your domain.

OK. I use the dyndns module, so I added the following to my modopts.ini file:

[dyndns]
txt = v=spf1 include:mail.synchro.net ~all

After a while I was able to see the SPF record with nslookup.

Tested again, and I was able to get an email out to my sbcglobal address (yes, it's quite an old address :P). So far not getting through to gmail though. Maybe gmail is stricter...? Wondering whether I need to worry about a DMARC record as well, and if so, is it possible to include multiple TXT records for the dyndns module?

No. I'm able to send to all the main mail providers withOUT a DMARC record, so I don't think that's necessary.
--
digital man (rob)

This Is Spinal Tap quote #7:
Nigel Tufnel: That's just nitpicking, isn't it?
Norco, CA WX: 54.3øF, 94.0% humidity, 1 mph N wind, 0.10 inches rain/24hrs
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Re: mail.synchro.net SEND/TLS warnings
By: Digital Man to Codefenix on Mon Feb 19 2024 05:01 pm

No. I'm able to send to all the main mail providers withOUT a DMARC record, so I don't think that's necessary. --

OK, good deal. This is the SPF record that ended up working for me:

[dyndns]
txt = v=spf1 ip4:71.95.196.36 ~all

Now I'm able to get through to my gmail inbox just fine.

I'm still a little confused why include:mail.synchro.net didn't do the job.

|01<|09co|03d|11e|15Ÿ|11e|03n|09ix|01>|07


...When one connects a 3-phase line, the phase sequence will be wrong.
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