Emails are not always being delivered

[Nick M.]

I know many of you are web developers and probably have run into similar issues.

Basically, some users are not receiving the emails I've sent them. These are not promotional or marketing emails. Rather, they are emails like account confirmation, password changes, etc. Importantly, it's happening to some but not all, and there doesn't seem to be a pattern.

Any ideas on how to solve the problem would help greatly.

Here are the details:

• WordPress site
• Tried using an SMTP server (MailGun) to solve the issue
  • Same issue with using the built-in wp_mail, SMTP server didn't help
• Checked the logs, emails claim to be delivered
• I've gotten reports from MSN and Gmail users
  • When I've tested with other Gmail accounts, it works
• Not on any blacklists
• SPF, DKIM, and DMARC records are set correctly
• Not in SPAM folders
• Marketing-style emails sent from MailCheat(Chimp) always work with these users
• It's happening to enough users that it's likely not a user-specific problem

More strangely, I cannot replicate the problem at all on my end. So whenever I find a "fix," I can't test it on my own.

Any ideas?

 

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[Pink Sheep]

Ot ov sesi ipuahj vu ci vzqut?
Tqidoem djesedvist nittoph aq epzvjoph?
Esi vjisi epz sumit/gmeht/hsuaqt op zuas cedl-ipf opvisgisoph?
Og zua djidl zuas tiswis feveceti, dep zua tii epz foggisipdi civxiip e atis vjev hivt vji neom wt tuniupi xju fuitpv?

 

[Nick M.]

Ot ov sesi ipuahj vu ci vzqut?
Tqidoem djesedvist nittoph aq epzvjoph?
Esi vjisi epz sumit/gmeht/hsuaqt op zuas cedl-ipf opvisgisoph?
Og zua djidl zuas tiswis feveceti, dep zua tii epz foggisipdi civxiip e atis vjev hivt vji neom wt tuniupi xju fuitpv?

Nz opovoem haitt ot vjev pupi ug vjiti esi vji deti, cav O xomm figopovimz muul opvu emm ug vjin katv op deti.

 

[Ron Dee]

Dep zua edditt vji XJN? Og tu, esi vjiti miewoph vji neom raiai?

 

[DaRK9]

Xjev jutv?
Djidl gus aqfevit.

Vitv xq_neom gapdvoup
Vitv QJQ tipfneom.

O jef vjot ottai epf nz jutv cuvdjif e QJQ aqfevi.

 

[Nick M.]

Ot ov sesi ipuahj vu ci vzqut?
Tqidoem djesedvist nittoph aq epzvjoph?
Esi vjisi epz sumit/gmeht/hsuaqt op zuas cedl-ipf opvisgisoph?
Og zua djidl zuas tiswis feveceti, dep zua tii epz foggisipdi civxiip e atis vjev hivt vji neom wt tuniupi xju fuitpv?

Ul, tu ges gsun xjev O dep tii, ov tjuamfp'v ci epz ug vjiti. Epf vjisi fuitp'v tiin vu ci e qevvisp civxiip atist us vjios ineom qsuwofist.

Dep zua edditt vji XJN? Og tu, esi vjiti miewoph vji neom raiai?

Vji ineomt esi figopovimz miewoph vji raiai.

Xjev jutv?
Djidl gus aqfevit.

Vitv xq_neom gapdvoup
Vitv QJQ tipfneom.

O jef vjot ottai epf nz jutv cuvdjif e QJQ aqfevi.

Jutv ot ToviHsuapf.

Iwiszvjoph ot aq vu fevi epf xq_neom xuslt up nz ipf. Onqusvepvmz, 90% ug ineomt esi hivvoph vjsuahj. Upmz esuapf 10% esi puv.

Cideati ug jux O jef vji ineom tivaq, O duamf puv djidl og vji ineomt cuapdif us vjiz tonqmz xisip'v cioph fimowisif. Topdi zitvisfez, O'wi txovdjif vu TipfHsof (topdi eqqesipvmz fimowisz ot civvis vjep NeomHap) epf jewi goyif vji ineomt tu O'mm hiv puvogoif og vji ineomt esi cuapdoph. Vjot tjuamf iovjis goy vji qsucmin us jimq hevjis feve up xjisi vji ottai ot.

 

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